Download 1. The frog leaps from its resting position at the lake`s bank onto a lily

1. The frog leaps from its resting position at the
lake’s bank onto a lily pad. If the frog has a
mass of 0.5 kg and the acceleration of the leap
is 3 m/s 2, what is the force the frog exerts on
the lake’s bank when leaping?
A 0.2 N B 0.8 N
C 1.5 N
D 6.0 N
6. Colton (23 lbs) runs into Danny with enough
force to move Danny at an Acc of 4 m/s2. Eli
(who weighs 46 lbs) runs into Danny at the
same acceleration, how much more force does
Eli create.
a. 204N b. Double c. Half d. 23N
2. A wet bar of soap slides 1 meter across a wet
tile floor without appearing to slow down. Which 7. What is the mass of a falling rock if it
of these statements explains why the bar of
produces a force of 147N?
soap fails to slow down?
m=_147/9.8= 15 kg_____
A. A constant force on an object produces a
constant positive acceleration.
B An object in motion tends to remain in
motion in the absence of an external force.
C A moving object having constant velocity
contains kinetic energy.
D An object’s weight is proportional to its mass.
3. When a car suddenly stops, a book lying on
the car seat slides forward. Why does the book
continue to move forward?
A The book loses its backward momentum.
B The car moves in reverse more rapidly than
the book.
C The friction of braking transfers energy to the
book.
D The book’s inertia causes it to continue
moving.
SMASH AND SMOOCH
Smash and smooch are on a car ride in a
vehicle weighing 5000 kg. Smash weighs 500
Kg, and Smooch weighs 500 kg. While driving
down the road at 15 m/s Smash hits a wall
causing the car to return to rest in 10 seconds.
During this time Smooch decides to give Smash
a big kiss on the lips.
4. What is the mass of a truck if it produces a
force of 14,000 N while accelerating at a rate of
8. (5 )What was the cars acceleration in the
5 m/s2?
last 10 seconds? 0-15/10= -1.5 m/s2
a. 2800g b.2.8 x103Kg c.28 Kg d. 2.8x103
Kg
9. (5)Smooch had no seat belt so how much
force did she travel through the window with?
5. Which answer does not relate to Newtons
500 x 1.5 =750N
2nd Law:
10. (5) Smash was buckled up so which law of
a. Balanced Forces
motion saved his life.
b. Change
Law of inertia
c. Unbalanced Forces
11. (5)How much force did the car hit the wall
d. F=ma
with? 5500x1.5=7500N
Based on this information draw a proper
Force body diagram and find:
Fg = FN = 100N What is the Net Force on
these two Free Body Diagrams? 0Newtons
for both
Fapp = 53.6N
Ff = 45.2N
FNET = 11.4N right
12. Mass of the object 100/9.8=10.2kg
15. On a plane ride Eluid realizes he forgot
his physics homework. So he jumps out of
the plane, he remembers the importance of
air resistance and spread is arms and legs
14. A sled accelerates at a rate of 2 m/s2. out producing 1500 Newtons of force to
If the net force is trippled and the mass is counteract the 1715 Newtons of gravity.
doubled what is the new acceleration of the He almost misses the school but luckily he
sled. 3 m/s2 or increased by half
has a fan which he turns on createing 150
Newtons of applied force with no friction.
13. Accleration of the object 11.4/10.2=
1.12 m/s2
Based on the information above draw a
force diagram and calculate his Mass,
vertical, and horizontal acceleration.
Mass= 175 kg
Vertical Acc= 1.23 m/s2
Horizontal= .86 m/s2