1. A 6 kg sled slides down a snow-covered hill at an angle of 23. Ignoring friction, how fast is the sled going as it reaches the bottom of the 12-meter-long hill? If possible, show your work. At a minimum, describe the steps you took to get your answer.

2. Dr. Feynman is testing Newton's Second Law using a frictionless table, various masses, and a digital motion sensor which, when connected to her computer, will calculate the acceleration of each mass. The same force will be applied to all the different masses. Describe the relationship that will be seen between the mass tested and the acceleration it will experience.

3.Which of the following would be considered an example of Newton's Second Law? I. The force of gravity pulls a baseball toward the ground, making it accelerate vertically. II. In space, a baseball thrown moves on forever in the direction it was thrown. III. A baseball thrown exerts a force on the thrower equal to the force the thrower exerts on the baseball.

4.A tank is dropped out of a plane with a parachute. After a few seconds it is falling with a constant velocity. If the tank weighs 20000 N, what is the force of air friction on the tank and chute? Explain your response.

5.Which of the following would be considered an example of Newton's First Law? I. The force of gravity pulls a baseball toward the ground, making it accelerate vertically. II. In space, a baseball thrown moves on forever in the direction it was thrown. III. A baseball thrown exerts a force on the thrower equal to the force the thrower exerts on the baseball.