Download 48.5 KB - KFUPM Resources v3

PYP001-MAJOR-I Solution
Right Answers are highlighted in Yellow [They are all choice A]
Q1.
Weight is
A)
B)
C)
D)
E)
A force
Same as mass
Acceleration due to gravity
Inertia
Not a vector
Q2.
Two forces F1 and F2 are acting on an object. If the magnitude of F1 + F2 has a maximum value
of 9 N and a minimum value of 1 N, then the magnitudes of the two forces would be:
A)
B)
C)
D)
E)
4 N and 5 N
2 N and 7 N
8 N and 1 N
3 N and 6 N
10 N and 1 N
Sec# Patterns of Motion and Equilibrium - Net Force
Grade# 50
Q3.
An object hanging from a rope is in mechanical equilibrium. Which of the following statements
is TRUE?
A)
B)
C)
D)
E)
The weight of the object is equal to the tension in the rope
The object moves upward with constant acceleration
The object has an acceleration of 10 m/s2 downward
The tension in the rope is greater than the weight of the object
The weight of the object is greater than the tension in the rope
Sec# Patterns of Motion and Equilibrium - The Equilibrium Rule
Grade# 60
Q4.
A car is traveling east at a constant speed of 100 km/h in a straight line. The driving force from
the car’s engine is 1000 N. The net force on the car is
A) 0 N
B) 1000 N east
C) 100 N east
D) 100 N west
E) 1000 N west
Sec# Patterns of Motion and Equilibrium - Net Force
Grade# 50
Q5.
An object is dropped from a tall building. Just before hitting the ground, its inertia will
A)
B)
C)
D)
E)
Be the same
Decrease
Increase
Increase then decrease
Increase by a small amount
Sec# Patterns of Motion and Equilibrium - Mass-A Measure of Inertia
Grade# 60
Q6.
In which of the following cases the net force is not equal to zero? An object
A)
B)
C)
D)
E)
Moving with constant speed in a circle
At rest
In static equilibrium
In dynamic equilibrium
Moving in a straight line with constant speed
Sec# Patterns of Motion and Equilibrium - Equilibrium of Moving Things
Grade# 70
Q7.
Object A has twice as much mass as object B. This means object A has twice as much
A)
B)
C)
D)
E)
Inertia
Velocity
Speed
Gravitational acceleration
Volume
Sec# Patterns of Motion and Equilibrium - Mass-A Measure of Inertia
Grade# 70
Q8.
According to Galileo, if we neglect air resistance, a ball fired from a cannon will continue to
move away from the cannon because of
A)
B)
C)
D)
E)
Its inertia
The large surface of the Earth
The wind
The gravitational force of the Moon
Its small volume
Sec# Patterns of Motion and Equilibrium - Mass-A Measure of Inertia
Grade# 50
Q9.
The friction force on an object is always
A)
B)
C)
D)
E)
Opposite to the direction of motion of the object
Equal to the applied force on the object
Opposite to the force of gravity
Equal to the weight of the object
Equal to the normal force
Sec# Patterns of Motion and Equilibrium - The Force of Friction
Grade# 70
Q10.
A 60-kg person stands on two identical bathroom scales with his weight evenly distributed
between the two scales. Each scale should read
A)
B)
C)
D)
E)
None of these
600 N
1200 N
Zero N
200 N
Sec# Patterns of Motion and Equilibrium - The Support Force
Grade# 60
Q11.
A block of mass m moves with constant velocity on a rough inclined plane. Which of the
following best describes the forces acting on the block?
A)
B)
C)
D)
E)
The sum of the friction force, the normal force and the weight is equal to zero
The friction force is equal to the normal force
The friction force is equal and opposite to the weight
The normal force is equal and opposite to the weight
The sum of the friction force, the normal force and the weight is greater than zero
Sec# Patterns of Motion and Equilibrium - The Support Force
Grade# 50
Q12.
A football player starts from rest, 30 meters from the goal line, and accelerates away from the
goal line at 1 m/s2. How far from the goal line is the player after 4 s?
A)
B)
C)
D)
E)
38 m
34 m
46 m
8m
26 m
Sec# Patterns of Motion and Equilibrium - Acceleration
Grade# 50
Q13.
An object is thrown vertically upward with an initial speed of 40 m/s. What is the distance
traveled by the object between the times t = 1 s and t = 2 s?
A)
B)
C)
D)
E)
25 m
20 m
40 m
60 m
35 m
Sec# Patterns of Motion and Equilibrium - Acceleration
Grade# 30
Q14.
If a car starts from rest and speeds up from Khobar to Riyadh, 400 km away, with a constant
acceleration equal to the acceleration due to gravity g, how long does it take the car to reach
Riyadh?
A)
B)
C)
D)
E)
4.7 minutes
4.7 seconds
4.7 hours
13.3 minutes
3.3 minutes
Sec# Patterns of Motion and Equilibrium - Acceleration
Grade# 40
Q15.
Consider two cars, A and B. Car A is moving west with a speed of 100 km/h. Car B is moving
east with a speed of 150 km/h. The velocity of car B relative to car A is
A) 250 km/h east
B)
C)
D)
E)
250 km/h west
150 km/h east
50 km/h east
50 km/h west
Sec# Patterns of Motion and Equilibrium - Speed and Velocity
Grade# 60
Q16.
Which of the following objects is in free fall (ignore air resistance)?
A)
B)
C)
D)
E)
All mentioned objects are in free fall
A stone thrown downward
A bullet fired from a gun
A stone dropped from a building
A stone thrown upward
Sec# Patterns of Motion and Equilibrium - Acceleration
Grade# 40
Q17.
At one instant, a car is moving at 10 m/s north. One second later it is moving at 10 m/s south.
What is its acceleration during this one second interval?
A)
B)
C)
D)
E)
20 m/s2 south
0 m/s2
20 m/s2 north
10 m/s2 south
10 m/s2 north
Sec# Patterns of Motion and Equilibrium - Acceleration
Grade# 50
Q18.
A car moves along a circular race track with a constant speed of 50 km/h. What is
its average speed during one full circle?
A)
B)
C)
D)
E)
50 km/h
0 km/h
25 km/h
100 km/h
500 km/h
Sec# Patterns of Motion and Equilibrium - Speed and Velocity
Grade# 60
Q19.
A 2-kg book is at rest on a rough horizontal table. How much friction is acting on the book?
A)
B)
C)
D)
E)
0N
20 N
10 N
2N
1N
Sec# Patterns of Motion and Equilibrium - The Force of Friction
Grade# 70
Q20.
Nellie hangs at rest from the ends of the rope as shown in Figure 1. Her mass is 50 kg. What is
the reading on the scale?
Fig#
Figure 1
A) 25 kg
B) 50 kg
C) 75 kg
D) 100 kg
E) 0 kg