Enter your Name:   Enter your E-mail Address:  Be sure to write all your answers with the proper number of significant figures and to list the units that go with your answers! 01. A car's engine is giving out. The car erratically speeds up and slows down. Can we use the equations we derived in this module to analyze its motion? Explain. 02. Suppose you are doing physics experiments outside in a thick fog. Fog makes the molecules and atoms in the air more difficult to move. In those circumstances, would you expect the air resistance in your experiments to be more, less, or the same as it would be without fog? 03. Under the circumstances described in problem #2, would you expect the terminal velocity of the objects you are studying to be lower, higher, or the same as without fog? 04. A bullet is shot out of a gun straight up in the air. When it falls back to earth, a radar gun measures its velocity to be 125 m/sec downwards when it reaches the same place from which it was fired. What was the velocity of the bullet when it left the gun? 05. When the bullet in problem #4 reached its maximum height, what was its velocity? 06. When the bullet in problem #4 reached its maximum height, what was its acceleration? 07. When an object moves at constant velocity, what is its acceleration? 08. If you drop two objects and they do not fall at the same rate, what can you conclude about the effect of air resistance on the two objects? 09. A boat travels for 4.0 hours at a constant velocity of 10.0 m/sec. How far does the boat travel? (1 hr = 3600 sec) 10. To measure the height of a building without a ruler or tape measure, an engineer drops a rock off the top of the building and finds out that it takes 4.9 seconds for the rock to reach the ground. How high is the building? 11. A car accelerates from rest at 0.21 m/sec2 for 2.0 minutes. What is its final velocity? 12. A driver is driving down the road and sees a deer in his headlights. The driver hits the brakes, which provide a deceleration of -7.0 m/sec2. If the car's initial velocity was 25 m/sec, how far will the car skid before coming to a stop? 13. If a bicyclist starts from rest and accelerates at 1.1 ft/sec2 for 1.0 minute, how far will the bicyclist travel? 14. A cannon shoots its cannonball straight up in the air with an initial velocity of 2.0 x 102 m/sec. What is the maximum height that the cannonball will reach? 15. A happy graduate is throwing her graduation cap into the air. She releases the cap 6.0 feet from the ground and it takes 2.1 seconds to land on the ground. What initial velocity did she give to the cap?