A two man bobsled is pushed along a horizontal, frictionless track by the brakeman. The driver and
bobsled have a mass of 280 kg. The brakeman pushes with a net force of 160 N a distance of 50
m. What is the final speed of the bobsled just before the brakeman jumps into the sled? The sled
was pushed for 6.61 s. How much power does the brakeman expend on the sled?
A 0.05 kg golf ball is placed on a tee. The golf ball is hit by a golf club and has a final speed of 40
m/s. Assume that the force of the golf club acts parallel to the motion of the ball and that the club
is in contact with the ball for a distance of 0.02 m. How much work is done on the ball by the club?
Calculate the average force applied to the ball by the club.
1 answer
1 answer