A student throws a 0.140kg ball straight upwards to a height of 7.20 m. How much work did the student do? _______ J
A 33.8 kg child starting from rest slides down a water slide with a vertical height of 20.2 m.
1) What is the child's speed halfway down the slide's vertical distance? ___m/s
2) What is the child's speed three-quarters of the way down? ____m/s
How much longer must the minimum length of a plane mirror before a 6 ft 1 in man to see his complete head-to-toe image than for 5ft 5 in woman to do so? ____in