A pebble is released from rest from the edge of a cliff that is 80 m high.
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A pebble is released from rest from the edge of a cliff that is 80 m high.
(i) Calculate the time taken by the pebble to reach the foot of the cliff.
(ii) Determine the magnitude of its velocity just before it strikes the ground.
(iii) Sketch a velocity–time graph for the entire motion and state what the slope of the graph and the area under the graph represent in this context.