A stone is released from rest from the top of a tower that is high
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A stone is released from rest from the top of a tower that is 80m high.
Solve the following using two different sign conventions:
(i) Calculate the time taken by the stone to reach the ground level in each convention.
(ii) Determine the velocity of the stone just before impact in each convention, clearly indicating the sign.
(iii) Comment on the numerical values and signs obtained in parts (i) and (ii). Explain why the physical results are identical even though the algebraic signs differ.