confused? question 1? the Hull fis nceptual Questions B depressin the \"accelera

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confused?

question 1?

the Hull fis nceptual Questions B depressin the "accelerator" (gas pedal) of a car the only way that the driver can make the car accelerate (in physics sense of the word)? f not, what else can the idrver do to give the car an acceleration? Two children ride on a merry-go-round. One is 2 m from the axis of rotation and the other is 4 m from it. Which child has the larger (a) lim eed, (b) accelera- (c) angular speed, and (d) angular displacement? Explain why the orbital radius and the speed of a satel

Explanation / Answer

1. No. Since acceleration is the change of velocity, and velocity is speed WITH direction, changing the direction of the car will change the velocity and therefore the acceleration. So, by turning the wheel, the driver changes the acceleration.
2. (a) The child 4m away has the larger linear speed. (b) The child at 2m has the greater acceleration. (c) They both have the same angular speed. (d) The child at 4m has a larger angular displacement.
3. The velocity is not constant and neither is the acceleration. The velocity is constantly changing because in a circular motion, the direction is always changing. If the velocity is not constant, than neither is the acceleration.
4. The force does not push you to the left. An object in motion had the tendency to travel in a straight line path, and so the force you are experiencing is centripetal force.

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