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GCSE Questions - Forces

Q4. Beth wants to find out the depth of a well.

She thinks that she can calculate this by dropping a stone into the well and timing how long it takes to hear the stone splash at the bottom.

(a)

(i) Explain how she could use this measurement to find the depth of the well.

[3 marks]

(ii) It takes 2.2 seconds for the stone to drop from rest and splash into the water at the bottom.

What is the speed of the stone when it hits the water?

[2 marks]

(b) Describe the motion of the stone as it falls.

Assume it does not reach terminal velocity.

Use a free body diagram to help you.

[4 marks]

(Total 9 marks)