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King Abdul-Aziz University
Faculty of Science at Khulais
Physics Department
Phys 110
Questions bank - chs.(4 - 7).
* CHOSE THE CORRECT ANSWER:
Ch. 4
Q.1. A particle goes from (x = −2m, y = 3m)
to
(x = 3m, y = −1m) , Its
displacement is:
A) (1 m)ˆi + (2 m)ˆj
C) −(5 m)ˆi + (4 m)ˆj
B) (5 m)ˆi − (4 m)ˆj
D) −(1 m)ˆi − (2 m)ˆj
____________________________________________________
Q.2 which of the following is a scalar quantity?
A) Speed
B) Velocity
C) Displacement
D) Acceleration
_____________________________________________________
- At this figure show the Projectile motion
Q.3 From this figure determined the maximum height (h):
vo sin 2 
A) h=
2l
2
vo sin 2 
B) h=
2g
2
2
v l
C) h= o
2g
D) h=
cos 
2g
____________________________________________________
Q.4 the maximum Range (R):
2
A) R 
vo
g
B) R  sin 2
2
C) R 
vo
sin 2
g
2
D) R 
vo
cos 
g
____________________________________________________
Q.5 From this figure determined the total time of flight (T):
A) T 
2vo
g
B) T 
sin 
g
C) T 
2 vo
hl
D) T 
2vo sin 
g
____________________________________________________
Q.6 – When a projectile fired from the origin with Initial speed V at different .
The maximum range occurs when …………………….
A)  = 45
B)  =90o
C)  =180o
D)  =360o
____________________________________________________
Q.7 – When a projectile fired from the origin with Initial speed V at different .
The maximum height occurs when …………………….
A)  = 45°
B)  =90o
C)  =180o
D)  =360o
____________________________________________________
Q.8– When a projectile fired from the origin with Initial speed V at different .
The maximum value for the time of maximum range value occurs when
…………………….
A)  = 45°
B)  =180o
C)  =360o
D)  =90o
____________________________________________________
Q.9- In a projected body, the component of its velocity in x –direction
is………..
A) Vo
B) remains constant with time
C) Accelerated
D) changes with the angle
____________________________________________________
Q.10- In a projected body, the component of its velocity in y –direction is
zero at…………………………….
A) V= Vo
B) remains constant with time
C) The bottom of the path
D) The peak of the path
__________________________________________________
Q.11- The coordinates of a particle moving in the xy-plane are given by: x
=1+2t2
y =2t+1t3
The particle's velocity and it's direction at time t=2 sec
A) 16.1 m/s , 60.3° B) 22 m/s , 50.3°
C) 32 m/s , 45°
D) 43 m/s , 10.5°
____________________________________________________
Q.12- A large cannon is fired from ground level at an angle of 30 above the
horizontal. The muzzle speed is 980 m/s. The horizontal distance the
projectile will travel before striking the ground, assume g = 9.8 m/s2
A) 8.5 km
B) 45 km
C) 33 km
D) 85 km
____________________________________________________
Q.13- A car rounds a 20 m radius curve at 10 m/s. The magnitude of its
acceleration is:
A) 0 m/s2
B) 0.2 m/s2
C) 5 m/s2
D) 40 m/s2
_____________________________________________________
Q.14- A boat heading north crosses a river with speed of 10 km/h relative to
the water. The river has speed of 5.00 km/h to as relative to the Earth.
Determine velocity of the boat relative to an observer standing on bank.
A) 25 m/s, 20,8°
B) 12 m/s, 46,6°
C) 10 m/s, 50,5°
D) 125 m/s, 26,6°
_____________________________________________________
Ch. 5
Q. 15- The weight is
A) is the force exerted on the body by the earth
C) W = m. a
B) W = m. g
D) A and B
____________________________________________________
Q.16- The weight measuring unit is
A) Newton
b) dyne
Q. 17- 1 Newton =
A) 1 Kg. m. S-2
C) Kg. m. S-2
B) 105 dyne
D) All of these
c) A and B
D) 5 dyne
_________________________________________________
Q.18- The …………. is defined as the force when acting on a mass of 1 Kg produced an
acceleration of 1 m.s-2
A) Newton
B) meter
C) dyne
d) Velocity
_________________________________________________
Q.19- The …………. is defined as the force when acting on a mass of 1 g
produced an acceleration of 1 cm.s-2
A) Newton
B) meter
C) dyne
d) Velocity
Q.20- 1 dyne =
A) 105.5 Newton
B) 105 Newton
C)10-4 cm
D) 10-5 Newton
___________________________________________________
Q.21 - First Newton’s law of motion states that:
A) F = ma
B) Everybody continues in its state of
rest or motion, unless it's forced to change that state by force.
C) F12 = - F21
D) None of the above
____________________________________________________
Q. 22 – The friction coefficients µs and µk are depending on:
A) Nature of the velocity
B) Nature of the surfaces
C) Nature of the Air
D) Nature of measurements.
____________________________________________________
Q.23 This law “For every action there is a reaction equal in magnitude and
opposite in direction” is:
A) Newton’s second law
B)Hook's law
C) Newton’s first law
D) Newton’s third law
_____________________________________________________
Q.24 A traffic light weighing 150 N hangs from a cable tied to two other
cables fastened to a support. The upper cables make angles of 37.0° and
53.0° with the horizontal. Find the tension in the three cables.
A) T1 = 75.1 N, T2 = 99.9 N, T3 = 125 N
B) T1 = 100 N, T2 =20 N, T3 = 150 N
C) T1 = 75.1 N, T2 =200 N, T3 = 30 N
D) T1 = 90.11 N, T2 =119.843 N, T3 = 150 N
Q.25 A traffic light weighing 125 N hangs from a cable tied to two other
cables fastened to a support. The upper cables make angles of 37.0° and
53.0° with the horizontal. Find the tension in the three cables.
A) T1 = 75.1 N, T2 = 99.9 N, T3 = 125 N
B) T1 = 100 N, T2 =20 N, T3 = 150 N
C) T1 = 75.1 N, T2 =200 N, T3 = 30 N
D) T1 = 90.11 N, T2 =119.843 N, T3 = 150 N
___________________________
Q.26 Force of static friction equal -------- .
A) fs ≤ µs n
B) fs ≥ 3µs n
C) fs ≥ µs n2
D) fs ≥ 2µs n
where µs: the coefficient of static friction and n magnitude of the normal force.
_____________________________________________________
Q.27. The force of Kinetic friction equal ……………………..
A) fk ≤ µk n
B) fk ≥ 3µk n
C) fk= µk n2
D) fk= µk n
_____________________________________________________
Q.28 A hockey puck on a frozen pond is given an initial speed of 20.0 m/s.
If the puck always remains on the ice and slides 115 m before coming to
rest, determine the coefficient of kinetic friction between the puck and ice.
A) 2.44
B) 0.177
C) 3.4
D) 5.66
_____________________________________________________
Q.29 Suppose a block is placed on a rough surface inclined relative to the
horizontal, as shown in this Figure. The incline angle is increased until the
block starts to move. Let us show that by measuring the critical angle θc at
which this slipping just occurs, determine the coefficient of kinetic friction (
µk)?
A) µk = cos θc
B) µk = sin θc
C) µk = tan θc
D) µk = cos 2θc
_____________________________________________________
Ch. 6
Q. 30 - The Periodic time is:
A)
1/f
B) The time required to complete one
circle
C)
2r
v
D) All is correct
____________________________________________________
Q.31- The frequency f is
A) The reciprocal of the Periodic time
B) The total number of complete cycles divided by the time
C) The time required to complete one circle
D) A and B
________________________________________________
Q.32 - The velocity in circular motion is variable because is:
A) Acceleration is zero
B) Time is constant
C) Speed changes direction
D) displacement = distance
_________________________________________________
Q.33 - A particle moving in a circular motion its acceleration directed:
A) The same direction of r
B) Outwards the center of the circle.
C) No direction
D) Towards the center of the circle.
____________________________________________________
Q.34- If a particle moving with uniform speed v in a circular path of radius r
experiences an acceleration ar that has a magnitude
A) ar= v2*r
B) ar= v2/3r
C) ar= 2v2/r
D) ar= v2/r
Q.35- in comparison between the linear and curricular motion one
can note that ……
A) ar = r × a
b) ar = r2×a
c) ar = r2×a d) ar = a
____________________________________________________
Q.36- In comparison between the linear and curricular motion one
can note that ……
A) v = r × 2
b) v = r × 
c) v = r2×a d) v = 
____________________________________________________
Q.37- A ball of mass 1 kg is attached to the end of a cord 2 m long. The ball
is whirled in a horizontal circle as was shown this Figure. If the cord can
withstand a maximum tension of 100 N, what is the maximum speed the ball
can attain before the cord breaks? Assume that the string remains horizontal
during the motion.
A) 14.14 m/s
B) 12.51 m/s
C) 10.41 m/s
D) 44.21 m/s
Q.38 At Q.37 Calculate the tension in the cord if the speed of the ball is
5.00 m/s.
A) 10.35 N
B) 8.33 N.
C) 12.50 N
D) 22.56 N
_____________________________________________________
Q.39 A small object of mass m is suspended from a string of length L. The
object revolves with constant speed v in a horizontal circle of radius r, as
shown in Figure (Because the string sweeps out the surface of a cone, the
system is known as a conical pendulum.) Find an expression for v.
A)
B)
C)
D)
V = √ Lg
V = √ Lg sinθ tanθ
V = √ Lg sinθ
V = √ L sinθ tanθ
____________________________________________________
Q. 40- in Q. 39 calculate the velocity v if L = 50 m and θ= 50 degree (g = 9.8
m / s2).
A)21.15
B) 21.15 m/s2
c) 21.15 m/s d) 21.15 m2
____________________________________________________
Q.41 A 1500-kg car moving on a flat, horizontal road negotiates a curve, as
illustrated in this Figure. If the radius of the curve is 35.0 m and the
coefficient of static friction between the tires and dry pavement is 0.500, find
the maximum speed the car can have and still make the turn successfully
A)
B)
C)
D)
43.1 m/s
33.4 m/s
13.1 m/s
3.1 m/s
____________________________________________________
Q. 42 A civil engineer wishes to design a curved exit ramp for a highway in
such a way that a car will not have to rely on friction to round the curve
without skidding. In other words, a car moving at the designated speed can
negotiate the curve even when the road is covered with ice. Such a ramp is
usually banked; this means the roadway is tilted toward the inside of the
curve. Suppose the designated speed for the ramp is to be 13.4 m/s (30.0
mi/h) and the radius of the curve is 50.0 m. At what angle should the curve
be banked?
A) θ = 40.4 o
B) θ = 20.1 o
C) θ = 30.5 o
D) θ = 50.1 o
____________________________________________________
Q. 43 A satellite moving in a circular orbit around the Earth. The gravitational
force between spherical objects and small objects that can be modeled as
particles having masses m1 and m2 and separated by a distance r is attractive
and has a magnitude Fg=G (m1m2)/r2 where G = 6.673 *1011 Nm2/kg2. Consider
a satellite of mass m moving in a circular orbit around the Earth at a constant
speed v and at an altitude h above the Earth’s surface, as illustrated in this Figure.
Determine the speed of the satellite in terms of G, h, RE (the radius of the
Earth), and ME (the mass of the Earth).
A) V = √( ME / RE + h)
C) V = √(G / RE + h)
B) V = √(G ME / RE + h)
D) V = √(G ME / RE )
_____________________________________________________
Q.44 From Q. 43 if a satellite is in a circular orbit around the Earth at an
altitude of 1000 km. The radius of the Earth is equal to 6.37 ×106 m, and its
mass is 5.98 ×1024 kg. Find the speed of the satellite?
A) v = 10 *103 m/s
B) v = 9 *105 m/s
C) v = 7.36 *1033 m/s
D) v = 7.36 *103 m/s
____________________________________________________
Q.45- The gravitational force between two particles having masses m1 and m2 and
separated by a distance r is
A) Fg = G(m1.m2/ r2)
B) Fg = G (q1.m2/r2)
C) Fg = G(m1.m2/r) D) Fg = G(2m1.m2/2r)
`____________________________________________________
_
Ch. 7
Q. 46- The work done on an object is directly proportional to:
A) Circular motion
B) Force
C) Polar Coordinates
D) Time
____________________________________________________
Q.47- ------ is the time rate of doing work.
A) Power
B) Newton's law
C) Work
D) Force
____________________________________________________
Q.48- The SI unit of power is joules per second (J/s), also called the ------ .
A) Gram
B) Meter
C) Watt
D) Joule
____________________________________________________
Q.49- A force acting on a particle varies with x, as shown in this Figure.
Calculate the work done by the force as the particle moves from x = 0
to x = 6.0 m?
A) 7 J
B) 23J
C) 18 J
D) 25 J
____________________________________________________
Q.50- From Work Done by a Spring this relation Fs = - k x is called ----------.
A) Hooke’s law
B) Joule
C) Newton's law
D) Power
Q.51- Potential energy is energy associated with the motion of a body
equal ------------ .
B) U = 2 m v3
A) U = 3/4 m v
C) U = m g h
D) U = 1/2 mv2
_____________________________________________________
Q.52- An elevator car has a mass of 1 000 kg and is carrying passengers
having a combined mass of 800 kg. A constant frictional force of 4 000 N
retards its motion upward, as shown in this Figure. What power must the
motor deliver at the instant its speed is v if it is designed to provide an
upward acceleration of 1.00 m/s2?
A) (10 x 104v3 ) W
C) (4.33 x 105 v ) W
B) (2.34 x 104v ) W
D) (2.34 x 104v ) W
_____________________________________________________
Q.53- The power P =
A) F. V
B)W/dt
C) A, b
D) w2/dt
_____________________________________________________
Q. 54. The work W =
A) F.x
B) Δ K
C) F. x2
D) A, B
_____________________________________________________
Q. 55 – 1 Watt =
A) 1J/s
B) 1 Kg. m2/s3
C) 1 N. m / S
D) All of these
____________________________________________________
Q. 56The time of flight has two values because:
A) Second order equation
B) y = 0 at two positions
C) At beginning and at arriving ground
D) All of the above.
____________________________________________________
Q. 57 Acceleration due to gravity on the surface of the moon gm is 1.7 m/s2
and moon radius is 1.74X106m, calculate the mass of the moon (G=6.67X1011
Nm2/Kg2)
A) 1000 kg
B) 6.0X1022 kg.N
C) 7.7X1022kg
D) 2.2X1030kg m
:‫ترجمة بعض الكلمات الواردة في األسئلة‬
Potential energy
Satellite
Civil engineer
particle
Acceleration
radius
whirled
uniform speed
‫طاقة الوضع‬
‫قمر صناعي‬
‫مهندس مدني‬
‫جسيم‬
)‫عجلة (تسارع‬
‫نصف قطر‬
‫يدور‬
Boat
Racing
direction
initial
height
maximum
coefficients of
friction
‫ سرعة منتظمة‬surface
‫قارب‬
‫سباق‬
‫اتجاه‬
‫ابتدائي‬
‫ارتفاع‬
‫أقصى‬
‫معامل االحتكاك‬
string
Vertically
Horizontal
Magnitude
Upward
dropped
design
‫ سطح‬Spring
‫خيط‬
‫عمودي‬
‫أفقي‬
‫قيمة عددية‬
‫إلى أعلى‬
‫سقط‬
‫يصمم‬
‫زنبرك‬