A ball reaches a height of 1.4 m after first impact with the surface. a. calculate the g. p.e of the ball of 50g dropped from 2.5cm.

b. calculate the energy loss on the impact with the surface.

c. state 2 types of energy into which the gravitational potential energy is converted on impact with the surface.

HELP pl.

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers