Question
A .15kg ball is dropped from a height of 14 m to the ground below, and hits the ground with a speed of 12 m/s.
With what speed would the ball have hit the ground if there were no air resistance?
How much work does the air resistance do on the ball?
With what speed would the ball have hit the ground if there were no air resistance?
How much work does the air resistance do on the ball?
Answers
bobpursley
no resistance:
Vf=sqrt2gh
work air resistance did?
mgh-1/2 m 12^2=work done on air
Air resistance does not do work, it absorbs energy at best.
Vf=sqrt2gh
work air resistance did?
mgh-1/2 m 12^2=work done on air
Air resistance does not do work, it absorbs energy at best.