Ineed asap 1.      suppose a skydiver (mass = 75 kg) is falling toward the earth.  when the skydiver is 100 m above the earth he is moving at 60 m/s.  at this point calculate the skydiver’s……. a.      (2 pts.) gravitational potential energy            b.      (2 pts.) kinetic energy            c.      (2 pts.) total mechanical energy  (the sum of kinetic and potential energy)

What equation is used to calculate the weight of an object on a plant ?

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.

When solid surfaces slide over each other the kind of friction that occurs is called friction