Describe two different forces air can exert on an object. Which has more momentum, a 9,000 kg semi truck that is stationary, or a 300 kg motorcycle traveling 20 meters per second? Which has a greater inertia? Explain.
Suppose you are paddling in a canoe on a lake. Use one of Newton’s laws of motion to explain how your paddling moves the canoe. Describe that law, and explain how it applies.
Which of Newton’s laws of motion explains why it takes more force to push a cart loaded with books than the same cart when it is empty? Describe that law, and explain how it applies.
Suppose you run a mile around an oval-shaped track. Describe how you would experience acceleration at the start of your run and also at the end of your run. Could you experience acceleration in the middle of the run without changing your speed? Explain.
You are sitting in a moving train watching the scenery pass by. At some point, you pass a boy sitting on his porch watching your train go by. You are sitting still in the train, and so is the boy on his porch, even as you watch each other recede into the distance. Describe how your frame of reference and the boy’s affect how you perceive each other’s apparent motion.