.When a dog gets wet, it shakes its body from head to tail to shed the water. Explain, in terms of Newton’s first law, why this works.

4. A fish rests on the bottom of a bucket of water while thebucket is being weighed on a scale. When the fish begins toswim around, does the scale reading change? Explain youranswer.

4. You are on a trip to the Moon and have no apparent weight. Youare handed two identically sized boxes, one filled with ping pong ballsand the other with steel free weights. How can you tell which is whichwithout opening them? (Hint: Use Newton’s Laws to explain yourideas)

16.

e) Clearly, there is a force of gravity on the space station and everything inside of it. Yet, the apparent weight of an object aboard the space station is roughly zero, i.e. objects float around relative to the space station as if there is no force of gravity. Explain why objects at the space station appear "weightless", in 1 or 2 sentences. We talked about this in lecture. Nothing too complicated about this.

When you are in a car's passenger seat (on the right –US car), and the driver turns left, you are thrown against the car door. Your little nephew says there is a force pushing you out of the car. Explain what is really happening, using good physics.