I've got a few questions on a "semester review" that I'm not understanding fully, and can't find the answers or explanations in my book. I'd be incredibly grateful if somebody could explain any or all of them to me!(adsbygoogle = window.adsbygoogle || []).push({});

For a lot of them, I have an idea of the answer but I'd like to know the reasoning behind it. Some is because I just haven't dealt with it for a while, and so might just need a refresher to be able to answer correctly.

Why does a baseball player follow through when he hits the ball? (I know this has something to do with impact/impulse, but I'm not quite sure.)

A ladybug on the inside of a spinning wheel will experience a force like gravity. (True/False question. I'm thinking true - I remember talking about spinning spaceships creating a gravity effect. How does this work?)

To increase rotational inertia, a tightrope walker carries a long stick. (True/False.)

If you squeeze a loaf of bread, its mass and density will increase. (True/False. I know density will increase, not sure about mass.)

A cannonball is fired at some angle and moves 10 meters horizontally in 1 second. How far will it move in the next second? (...no idea.)

A car is moving in a circle at a constant speed. What is the net force acting on it?

A car accelerates from rest to 20m/s in 10 seconds. It weighs 10,000 Newtons. What is the force on the car?

Essay Question:

Describe how Newton's three laws can be applied to a rubber ball that bounces off the wall of a no-gravity spaceship. Where is momentum conserved? (I can get through the law of inertia and action and reaction, but I'm not sure how force and acceleration applies to this. And again, I don't remember what momentum "being conserved" is. Sorry!)

Thank you so much for any help. :)

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# Homework Help: Some random questions on homework.

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