Newton's 3rd Law Quiz

1.

1 point

If the apple has a mass of 0.150 kg determine the acceleration of the Earth.
The mass of the Earth is 5.97e24 kg.

5.85e25 m/s2

65 m/s2

2.46e-25 m/s2

1.4715 m/s2

2.

1 point

Two masses are connected by a string that passes over a pulley. Find the acceleration of the masses if m = 3.1 kg and M = 4.4 kg.

9.8 m/s2

12.7 m/s2

1.7 m/s2

73.5 m/s2

3.

1 point

A 50 kg box is placed on a horizontal frictionless icy sidewalk. Miles applies a constant force on another box of 10 kg and slides it towards the first box with an acceleration of 1 m/s2. What is the acceleration of the 50-kg box as it is struck by Miles’ 10 kg box?

0.2 m/s2

5 m/s2

45 m/s2

4500 m/s2

4.

1 point

A stalled car is pushed with a force of 342 N from rest. How far does the car travel in 12 seconds if it's mass is 989 kg?

0.35 m

0.014 m

25 m

2.33 m

5.

1 point

You just got a couple of identical 20.0 kg shopping carts to do some shopping. The reason you have two is that they are unfortunately stuck together. You push them into the store to get help pulling them apart. You are running towards the store accelerating the shopping carts at 1.2 m/s2. Determine the force the second cart exerts on the first cart.

-24 N

-12 N

-48 N

-20 N

6.

1 point

When a rifle fires a bullet, the force the rifle exerts on the bullet is exactly the same (but in the opposite direction) as the force the bullet exerts on the rifle… so the rifle “kicks back”. The bullet has a mass of .015 kg and the rifle is 6.0 kg. The bullet leaves the 0.75 m long rifle barrel moving at 70 m/s. Determine the force of the rifle on the bullet.

147 N

25 N

49 N

98 N

7.

1 point

Inside Wal-Mart, you see an employee pushing two boxes out of
the stock room. Box #1 has a mass of 4.50 kg. Box #2, 2.36 kg. The employee is pushing with a force that causes the two boxes to accelerate at
1.12 m/s2. You know that the friction acting on the box #2 is 14.8 N.
Determine the force the box #2 is applying against box #1.

14.8 N

12.16 N

2.64 N

17.4 N

8.

1 point

Two toy carts of mass 1.0 kg and 1.2 kg are each attached to springs. The carts are pressed close to each other such that the springs are compressed. When the carts are released, the 1-kg cart moves with an acceleration of 0.5 m/s2. What is the acceleration of other cart?

0.60 m/s2

4.2 m/s2

4500 m/s2

0.42 m/s2

9.

1 point

Miles is walking at a constant speed while carrying a 11 kg box. Which of the following is NOT an action-reaction pair?

the gravitational force of Earth on Miles-the gravitational force of Miles on Earth

Miles' foot pushing down on the ground-the ground pushing up of Miles' foot

the weight of the box pushing down on Miles' hands-Miles' hands pushing up on the weight of the box

the weight of the box pushing down on Miles' foot-Miles' foot pushing up on the box

10.

1 point

Earth's mass is exactly 81 times the mass of the moon. If Earth exerts a gravitational force of magnitude F on the moon, then the gravitational force exerted by the moon on Earth is

F

F/81

9.8F

81F