crazydesigners
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Help answer. 
1. During the Korean War in 1950s, American pilots flying F86 reported that try lost 30 to 40 miles per hour in air speed whenever they fired their guns. Explain.
2. If you dive into the water and land flat on your chest in what is referred to in some circles as a "belly flop," you are likely to remember it for a while. Explain the physics behind what's happening.
3. Why should a batter pay more attention to follow-through when hitting a softball as opposed to a hardball? Every now and then a player will hit a ball so hard that the bat itself shatters. Explain how this happens in term of Newton's Laws. Drop a ball and watch it hit the floor and rebound back upward. According to the First Law, there must have been an externally applied upward force on the ball. What was it?
4. It is fairly to catch a 20-N steel weight dropped from a height of 1-4m or so. But if you attempt to catch the weight while resting your hand flat on a table, you are likely to be injured. Explain.
5. Which would be more difficult to throw at a given speed while hovering in space: a "weightless" tennis ball or a "weightless" bowling ball? Explain. Can astronauts floating in orbit tell which objects around them would be heavy or light on Earth even though everything is weightless? How?
6. Which stings the hand more (if either)--catching a ball in flight while running toward it or away from it? Explain.
7. Why would happen to two astronauts if, while floating stationary with respect to one another, they played catch with a baseball?
8. It is possible to hold a large rock or a massive lump of clay and slam it with a hammer and yet not hurt the hand holding the object? Explain what is happening in terms of energy and momentum.
1. During the Korean War in 1950s, American pilots flying F86 reported that try lost 30 to 40 miles per hour in air speed whenever they fired their guns. Explain.
2. If you dive into the water and land flat on your chest in what is referred to in some circles as a "belly flop," you are likely to remember it for a while. Explain the physics behind what's happening.
3. Why should a batter pay more attention to follow-through when hitting a softball as opposed to a hardball? Every now and then a player will hit a ball so hard that the bat itself shatters. Explain how this happens in term of Newton's Laws. Drop a ball and watch it hit the floor and rebound back upward. According to the First Law, there must have been an externally applied upward force on the ball. What was it?
4. It is fairly to catch a 20-N steel weight dropped from a height of 1-4m or so. But if you attempt to catch the weight while resting your hand flat on a table, you are likely to be injured. Explain.
5. Which would be more difficult to throw at a given speed while hovering in space: a "weightless" tennis ball or a "weightless" bowling ball? Explain. Can astronauts floating in orbit tell which objects around them would be heavy or light on Earth even though everything is weightless? How?
6. Which stings the hand more (if either)--catching a ball in flight while running toward it or away from it? Explain.
7. Why would happen to two astronauts if, while floating stationary with respect to one another, they played catch with a baseball?
8. It is possible to hold a large rock or a massive lump of clay and slam it with a hammer and yet not hurt the hand holding the object? Explain what is happening in terms of energy and momentum.