**1. Velocity is defined as:**

**A. rate of change of position with time**

B. position divided by time

C. rate of change of acceleration with time

D. a speeding up or slowing down

E. change of position

**2. Acceleration is defined as:**

A. rate of change of position with time

B. speed divided by time

**C. rate of change of velocity with time**

D. a speeding up or slowing down

E. change of velocity

**3. Which of the following is a scalar quantity?**

**A. Speed**

B. Velocity

C. Displacement

D. Acceleration

E. None of these

**4. Which of the following is a vector quantity?**

A. Mass

B. Density

C. Speed

D. Temperature

__E. None of these__

**5. Which of the following is NOT an example of accelerated motion?**

A. Vertical component of projectile motion

B. Circular motion at constant speed

C. A swinging pendulum

D. Earth’s motion about sun

__E. Horizontal component of projectile motion__

**6. A particle goes from x = −2m, y =3m, z =1mto x =3m, y = −1m, z = 4m. Its displacement is:**

A. (1m)ˆi + (2m)ˆj + (5m) ˆk

__B. (5m)ˆi −(4m)ˆj + (3m) ˆk__

C. −(5m)ˆi + (4m)ˆj −(3m) ˆk

D. −(1m)ˆi −(2m)ˆj −(5m) ˆk

E. −(5m)ˆi −(2m)ˆj + (3m) ˆk

**7. A jet plane in straight horizontal flight passes over your head. When it is directly above you, the sound seems to come from a point behind the plane in a direction 30◦**

**from the vertical. The speed of the plane is:**

A. the same as the speed of sound

__B. half the speed of sound__

C. three-fifths the speed of sound

D. 0.866 times the speed of sound

E. twice the speed of sound

8. A plane traveling north at 200m/s turns and then travels south at 200m/s. The change in its velocity is:

A. zero

B. 200m/s north

C. 200m/s south

D. 400m/s north

__E. 400m/s south__

**9. Two bodies are falling with negligible air resistance, side by side, above a horizontal plane. If one of the bodies is given an additional horizontal acceleration during its descent, it:**

__A. strikes the plane at the same time as the other body.__B. strikes the plane earlier than the other body

C. has the vertical component of its velocity altered

D. has the vertical component of its acceleration altered

E. follows a straight line path along the resultant acceleration vector

**10. The velocity of a projectile equals its initial velocity added to:**

A. a constant horizontal velocity

B. a constant vertical velocity

C. a constantly increasing horizontal velocity

__D. a constantly increasing downward velocity__

E. a constant velocity directed at the target

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