NSAA NSAA Physics - Mechanics

Question 1

A ball is thrown vertically upward with an initial velocity of 20 m/s. What is the maximum height reached (g = 10 m/s²)?

Accepted Answer

20 m

Answer

10 m

Answer

40 m

Answer

5 m

Question 2

A 5 kg block slides down a frictionless incline of 30°. What is its acceleration?

Accepted Answer

4.9 m/s²

Answer

8.5 m/s²

Answer

9.8 m/s²

Answer

2.5 m/s²

Question 3

Two objects of mass 3 kg and 5 kg collide and stick together. If the 3 kg object was moving at 8 m/s and the 5 kg was stationary, what is the final velocity?

Accepted Answer

3 m/s

Answer

4 m/s

Answer

5 m/s

Answer

2 m/s

Question 4

A car of mass 1000 kg accelerates from rest to 20 m/s in 10 s. What net force acts on it?

Accepted Answer

2000 N

Answer

500 N

Answer

1000 N

Answer

200 N

Question 5

A spring of spring constant 200 N/m is compressed by 0.05 m. What is the elastic potential energy stored?

Accepted Answer

0.25 J

Answer

0.50 J

Answer

1.00 J

Answer

0.10 J

Question 6

An object moves in a circle of radius 2 m at a speed of 4 m/s. What is its centripetal acceleration?

Accepted Answer

8 m/s²

Answer

2 m/s²

Answer

4 m/s²

Answer

16 m/s²