11.Consider a basketball (m = 375 g) that is thrown with an initial horizontal velocity of 7 m/s and an initial vertical velocity of 8 m/s.

1. Determine how long until it reaches its maximum height.
2. What is that maximum height?
3. How far does the basketball travel horizontally when it reaches its max height?

12.

You wish to raise a 400 kg wooden table straight up by 50 m. You have a 100 m long ramp and a pulley system with 8 pulleys. You can use either to lift the table. Which would be the easiest to use? Justify your answer with calculations!

13. Determine the magnitude of the force between two charges that are 40 cm apart, if the first charge is +0.008 C and the second charge is -0.009 C?

14.A 75 kg runner can accelerate from 0 m/s to 10 m/s in 1.7 s.

1. How far will the runner travel in that time?
2. What work is done by the runner?

15.A 1.8 kg mass is attached to a hanging spring with a spring constant of 790 N/m. The mass is displaced from its equilibrium position by 20 cm and system is observed to have an oscillating behavior. What is the period of the oscillating spring-mass system?

16. Two children are tugging on two ends of a rope in a tug of war. The children are stationary. If child 1 pulls with 120 N of force, what force must child 2 exert? Explain why?

17.You place 500 g of iron (c = 450 J/kg^oC) at an initial temperature of 17^oC into a hot oven. If 70,000 J of heat is added to the iron, what is its final temperature?

18. Your empty hand is not hurt when it bumps gently into a wall. However, when you are carrying a heavy load it does hurt. Why is this so and which of Newton's Laws are best applied to this situation?