Newton's 3rd Law
Class:
Name:
1.
(4) 4.0 N
(2) larger
(3) the same
(2) 10. N
(3) 50. N
(4) 250 N
A spring scale reads 20. newtons as it pulls a 5.0-kilogram mass across a table. What is the
magnitude of the force exerted by the mass on the spring scale?
(1) 49 N
5.
(3) 12 N
The magnitude of the force that a baseball bat exerts on a ball is 50. newtons. The magnitude
of the force that the ball exerts on the bat is
(1) 5.0 N
4.
(2) 24 N
A mosquito ying over a highway strikes the windshield of a moving truck. Compared to the
magnitude of the force of the truck on the mosquito during the collision, the magnitude of the
force of the mosquito on the truck is
(1) smaller
3.
Date:
A person kicks a 4.0-kilogram door with a 48-newton force causing the door to accelerate at
12 meters per second2 . What is the magnitude of the force exerted by the door on the person?
(1) 48 N
2.
__________
(2) 20. N
(3) 5.0 N
(4) 4.0 N
A man is pushing a baby stroller. Compared to the magnitude of the force exerted on the
stroller by the man, the magnitude of the force exerted on the man by the stroller is
(1) zero
(2) smaller, but greater than zero
(3) larger
(4) the same
page 1
6.
Two carts are pushed apart by an expanding spring, as shown in the diagram below.
If the average force on the 1-kilogram cart is 1 newton, what is the average force on the
2-kilogram cart?
(1) 1 N
7.
8.
(3) 0.5 N
(4) 4 N
If a 65-kilogram astronaut exerts a force with a magnitude of 50. newtons on a satellite that
she is repairing, the magnitude of the force that the satellite exerts on her is
(1) 0 N
(2) 50. N less than her weight
(3) 50. N more than her weight
(4) 50. N
A carpenter hits a nail with a hammer. Compared to the magnitude of the force the hammer
exerts on the nail, the magnitude of the force the nail exerts on the hammer during contact is
(1) less
9.
(2) 0.0 N
(2) greater
(3) the same
A student pulls a 60.-newton sled with a force having a magnitude of 20. newtons. What is
the magnitude of the force that the sled exerts on the student?
(1) 20. N
Class: __________
(2) 40. N
(3) 60. N
page 2
(4) 80. N
Newton's 3rd Law
10.
A 100.0-kilogram boy and a 50.0-kilogram girl, each holding a spring scale, pull against each
other as shown in the diagram below.
The graph below shows the relationship between the magnitude of the force that the boy
applies on his spring scale and time.
Which graph best represents the relationship between the magnitude of the force that the girl
applies on her spring scale and time?
(1)
(2)
(3)
(4)
Class: __________
page 3
Newton's 3rd Law
11.
A 70-kilogram hockey player skating east on an ice rink is hit by a 0.1-kilogram hockey puck
moving toward the west. The puck exerts a 50-newton force toward the west on the player.
Determine the magnitude of the force that the player exerts on the puck during this collision.
[1]
Class: __________
page 4
Newton's 3rd Law
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Class: __________
1.
Answer:
1
2.
Answer:
3
3.
Answer:
3
4.
Answer:
2
5.
Answer:
4
6.
Answer:
1
7.
Answer:
4
8.
Answer:
3
9.
Answer:
1
10.
Answer:
1
11.
Answer:
50 N.
Newton's 3rd Law
06/25/2013