Work
The unit for work
What is the Joule
The unit for power
Watt
The unit for energy
Joules
Energy is never created nor destroyed just converted from one form to another.
What is the law of conservation of energy
How much energy is produced when you do 400J of work?
400 J
The work required to lift a 500N object to a height of 40m.
20,000 J
How much power does it take a 600N person to climb to a height of 4m in 2min?
2 Watts
The type of energy due to an objects motion
Kinetic energy
A trapeze artist swings from the top of a platform to the other side, Describe the change in mechanical energy from the top of platform to the bottom of his swing where we assume height is 0m.
All PEg to all KE
A bow is pulled back.3m with an average force of 200N what is the energy stored in the bow?
60 J
A person applies a force of 50N to 600J of work. How far has the person moved the object?
12 m
A motor does a total of 480 joules of work in 5.0 seconds to lift a 12-kilogram block to the top of a ramp. The average power developed by the motor is
96 W
How much energy does a 500 watt bulb use in one hour?
1800000 J
What is the final speed of 5000 kg rollercoaster if it starts from rest at a height of 500m and ends at a height of 300m?
62.6 m/s
A 1.5-kilogram kitten jumping from the top of a 1.80-meter-high refrigerator to a 0.90-meter-high counter. Compared to the kitten's gravitational potential energy on top of the refrigerator, the kitten's gravitational potential energy on top of the counter is ___.
13.23 J
The work done by a 100 N force is applied at an angle of 30 degrees to move a 15 kg object at a constant speed for a distance of 5m.
433 J
A 4.0 x 10^3-watt motor applies a force of 8.0 x 10^2 Newtons to move a boat at constant speed. How far does the boat move in 16 seconds?
80 m
A.05 kg bullet strikes a block of wood with an initial velocity of 4m/s. What initial kinetic energy does the bullet have as it enters the wood.
0.4 J
A 40 kg monkey jumps up a tree with a velocity of 4m/s. How high will the monkey jump?
0.4 m
A toy launcher that is used to launch small plastic spheres horizontally contains a spring with a spring constant of 50. newtons per meter. The spring is compressed a distance of 0.10 meter when the launcher is ready to launch a plastic sphere. The spring is released and a 0.10-kilogram plastic sphere is fired from the launcher. Calculate the maximum speed with which the plastic sphere will be launched.
2.2 m/s