1. Draw a freebody diagram of the forces on each of the following situations. Make your diagram clear as to the forces involved. For all freebody diagrams, ignore air resistance unless it states otherwise. Be sure to state the type of friction, when appropriate. (All parts worth 10 points).
a. A hockey puck sliding across the ice. Include friction. Air resistance is NOT negligible.
b. A block sliding down an inclined plane, without friction.
c. A car parked on a hill, inclined 30 degrees
d. A person running, air resistance is NOT negligible.
e. A car skidding to a stop.
f. Three blocks are stacked on top of each other. The bottom block is being pulled to the right by a rope. The middle block does not slide relative to the top or bottom block, but the bottom block does slide relative to the ground. All surfaces have friction.
g. A ball is thrown straight up. Draw the freebody diagram of the forces on the ball at three locations (1) as it rises (2) at max height and (3) as the object falls. Ignore air resistance.
2. An object has a mass of 50 kg on Earth. Find the mass and weight of the object on Earth (|g| = 9.80 m s⁻²) Phobos (|g| = 0.0057 m s⁻²) and the Neutron Star at the center of the Crab Nebula (|g| = 2x10¹² m s⁻²).
3. Explain, using Newton’s 3ʳᵈ Law, how a person is able to paddle a canoe in the water.
4. Explain, using Newton’s 3ʳᵈ Law, why a plane can lift off the ground.
5. Why is the force of static friction an inequality? If a book touching a surface has a maximum static friction force of 80N, and a person pushes with a force of 50N, how much force will the static friction force exert?