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 ▸What is the quark composition of a proton?
How can an object be accelerating if it does not change in speed?
Why does an ice skater spin faster when they hold in their arms?
If a ball of mass 5kg is dropped from rest, how far will it travel in the 3 seconds after it reaches 150m from it's original position? Write down the change in it's total energy after the 3 seconds. (ignoring air resistance)