Amass of 2000 kg. is raised 5.0 m in 10 seconds. what is the potential energy of the mass at this height?

98,000 j
9800 j
0

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?