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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
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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
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3)
Which of the following is a scalar quantity?
- A) Speed
- B) Velocity
- C) Displacement
- D) Acceleration
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4)
Which of the following is a vector quantity?
- A) Mass
- B) Density
- C) Speed
- D) None of these
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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) Horizontal component of projectile motion
- D) Earth’s motion about sun
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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
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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
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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 south
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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
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10)
The velocity of a projectile equals its initial velocity added to:
- A) a constant horizontal velocity
- B) a constantly increasing downward velocity
- C) a constantly increasing horizontal velocity
- D) a constant velocity directed at the target
