In which of the following situations is the most work done on the object?
a. holding a 50 kg object.
b. carrying a 30 kg object down a 40 m long hallway.
c. lifting a 20 kg object 1 m up.
d. carrying a 15 kg object up a flight of stairs.
e. lowering a 25 kg object from a second story balcony to the ground

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Ways that industry and agriculture use physical properties to separate substances