Newton's Laws of Motion — Practice Quiz

Question 1

A body of mass 5 kg is in a lift accelerating upward at 2 m/s². The apparent weight is:

Accepted Answer

59 N

Answer

49 N

Answer

39 N

Answer

69 N

Question 2

In an Atwood machine with masses 3 kg and 5 kg, the acceleration is (g = 10 m/s²):

Accepted Answer

2.5 m/s²

Answer

5 m/s²

Answer

3.75 m/s²

Answer

1.25 m/s²

Question 3

Three blocks of masses 1, 2, and 3 kg are connected and pulled with 12 N. Tension between 2 kg and 3 kg:

Accepted Answer

2 N

Answer

4 N

Answer

6 N

Answer

8 N

Question 4

A person weighing 60 kg stands in a lift. If the cable breaks, apparent weight is:

Accepted Answer

0 N

Answer

60 N

Answer

588 N

Answer

120 N

Question 5

A 10 kg block on a frictionless surface is pulled by 20 N force at 60° above horizontal. Acceleration is:

Accepted Answer

1 m/s²

Answer

1.73 m/s²

Answer

2 m/s²

Answer

0.5 m/s²