Question

1. While you are seated on a chair, the resultant force on you is ..?

A. zero

B. up

C. down

D. dependent on your weight

2. Action-reaction forces

A. sometimes act on the same object

B. always act on the same object

C. may be at right angles

D. always act on different objects

3. A net force (F) acclerates a mass (m) with an accleration (a). If the same net force is applied to mass 2m, then accleration will be?

A. 4a

B. 2a

C. a/2

D.a/4

4. A ball is thrown with a velocity of 20 m/s at an angle of 60 degrees above the horizontal. What is the horizontal component of its instantaneous velocity at 2.0 seconds after its release?

A. 10 m/s

B. 17 m/s

C. 20 m/s

D. 0

5. Suppose a ball is thrown straight up. which if the following statements best describes the ball's velocity and acceleration at the stant which it reaches the highest point?

A. both its velocity and acceleration are 0

B. it's velocity is 0 and it's acceleration is not 0

C. it's velocity is not 0 and it's acceleration is 0

D. neither it's velocity not it's acceleration is 0

Answer 1