Worksheet 3 Motion in a Plane and a Projectile Motion Your Name: I. Consider the

Question

Worksheet 3 Motion in a Plane and a Projectile Motion Your Name: I. Consider the following situations. accelerating and give your reasoning. a) A car slowing down at a stop sign. For each of the situations determine if an object is b) Ball being swung in a circle at constant speed. e) A vibrating string. d) The Moon orbiting the Earth. e) A skydiver falling at terminal constant speed. f An astronaut in an orbiting space station. g) A ball rolling down a hill. h) A person driving down a straight section of highway at constant speed with her foot on the accelerator

Explanation / Answer

1. Yes, As the velocity change is observed as the car slowing down , means there is some kind of negative acceleration (retardation) acting on the car.

2. Yes, every object subjected to o circular motion either in constant or variable velocity, it associate with a centripetal acceleration.

3. Yes, vibration means simple harmonic motion and SHM always associate with acceleration.

4. Yes, same as (2)

5. No, during terminal velocity the net force on the object supposed to be zero and hence no acceleration observed in the motion of the falling object.

6. Yes, same as (2)

7.yes, it experience a force due to gravity.

8. No, as the velocity is constant so no acceleration observed in the motion of the car driving down on the highway.

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Comment in case any doubt.. Good luck

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