Question

1. Which one of the following statements is not possible?

1. An object has zero velocity and non-zero acceleration
2. An object travels with a northward velocity and a northward acceleration
3. An object travels with a constant velocity and a constant non-zero acceleration
4. An object travels with a changing velocity and a constant acceleration

             ____________

2. In a displacement vs. time graph, a sloped (non-horizontal) line indicates:

1. The object is moving with constant, non-zero, acceleration
2. The total displacement of the object is zero
3. The object is moving at a constant, non-zero, velocity
4. The object is at rest
5. This is not possible

             ____________

3. You stand on a scale in an elevator as it is moving downwards with constant, upwards acceleration. The reading on the scale (your “apparent weight”) is:

1. Less than your true weight
2. Greater than your true weight
3. Equal to your true weight
4. Zero
5. Not enough information to say

               ____________

4. A rocket, firing its engine and accelerating in outer space (no gravity or air resistance), suddenly runs out of fuel. Which of the following best describes its motion after burn out?

1. It continues to accelerate at the same rate
2. It continues to accelerate, but at a gradually decreasing rate, until it reaches a constant velocity
3. It immediately stops accelerating, and continues moving at the velocity it had when burn out occurred.
4. It immediately begins slowing down and gradually comes to rest
5. Its motion would depend on its initial acceleration and its mass

Answer 1

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