a ball is dropped from rest off a cliff of height 50m, determine the final velocity of the ball assuming no air resistance.
Consider the appropriate equation of motion to solve this (use SUVAT method). The equation v^2=u^2+2as is appropriate to solve. Substituting in the knowns gives v=+sqrt(29.8150)=31.32 which, quoted to the correct number of significant figures is 30m/s
CJ
Related Physics A Level answers
All answers ▸A small ball of mass 150 g is placed at a height of 20cm above the ground on an incline of 35°. It is released and allowed to roll down the slope; what will be the ball's speed when it reaches the ground? Assume friction and air resistance can be ignored.
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Ignoring air resistance, use an energy argument to find the speed of a ball when it hits the ground if it is dropped from 50m, where m is the mass of the ball.
Explain how resonance occurs for a driven oscillating system and describe the effect of damping on the resonant frequency.