Your gasoline engine has a limited supply of gasoline, able to do 5000 J of work. If you weigh 800 N, how high can this engine lift you?

A 699-kg elevator starts from rest and moves upward for 2.60 s with constant acceleration until it reaches its cruising speed, 1.83 m/s. (a) What is the average power of the elevator motor during this period? hp (b) How does this amount of power compare with its power during an upward trip with constant speed? (Give the power during an upward trip with constant speed.) hp Need Help? Read It

A 12.0 kg box is given an initial push that starts it sliding across the floor. It eventually comes to a stop. If the box has an initial velocity of 3.5 m/s, how much work is done by friction to cause it to come to a stop? (Yes, you are correct, you do not know the coefficient of friction.)

A bucket of water of mass 15 kg is pulled at constant velocity up to a platform 55 meters above the ground. This takes 8 minutes, during which time 8 kg of water drips out at a steady rate through a hole in the bottom. Find the work needed to raise the bucket to the platform. (Use g = 9.8m/s².) = Work = |

What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit of a hill of height 405 m in 46.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body.

Two construction cranes are lifting identical steel beams at a building site. Crane A lifts a beam in less time than crane B, but both cranes lift the beam the same vertical distance. What can you conclude about the work done and power exerted during these motions? Choose the one best answer. O Crane A and Crane B do the same amount of work and produce the same power. O Crane A does more work than crane B, and crane A produces more power. O Crane A does the same work as crane B, but crane A produces more power. O Crane A does more work than crane B, but both cranes produce the same power.

A 7.80-g bullet moving at 590 m/s penetrates a tree trunk to a depth of 5.60 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. N=(b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving. s=

A 3500 lb SUV is traveling at 30 mph up a 6% slope when the engine quits. Use work and energy to determine the distance traveled until the vehicle comes to rest (at which point the parking brake is applied). Assume drag forces are negligible.