Show:
Work
Potential and Kinetic Energy
Conversation of Energy
Power
100
This is the unit of work.
What is Joules.
100
This are the quantities that kinetic energy depends on.
What are velocity and mass.
100
Walter, who has a mass of 60 kg, is on a roller coaster. The first hill is 50 meters tall, and he goes over the top of it at 15 m/s. The bottom of the first hill is 8 meters above the ground. This is how fast Walter is moving when he gets to the bottom.
What is 32.6 m/s.
100
This is how much power is required to do 120 J of work on an object in 3 seconds.
What is 40 W
200
If a neighbor pushes a lawnmower four times as far as you do, but exerts only half the force, this person has done how much more work than you?
What is 2x as much work.
200
This is the velocity of a 90 kg object with a kinetic energy of 450 J.
What is 3.16 m/s.
200
Walter, who has a mass of 60 kg, is on a roller coaster. The first hill is 50 meters tall, and he goes over the top of it at 15 m/s. Walter is moving 30 m/s as he goes over the top of the second hill. This is how tall the hill is.
What is 16.25 m
200
This is the power exerted by lifting a 50 kg barbell 1.6 m high in 0.8 seconds.
What is 98 W.
300
A 2.5 kg cart is pushed from rest to 8 m/s. It travels 4.8 meters horizontally in this time. This is how much force is exerted on the cart.
What is 16.7 N
300
What quantities does gravitational potential energy depend on?
What is height, mass, and acceleration of gravity.
300
A 0.5 kg arrow is fired up into the air at 42 m/s. This is how high it goes?
What is 88.2 m
300
This is how any joules of energy a 60 W light bulb can produce in 25 minutes.
What is 90,000 J.
400
A 15 kg box is lifted up 2.7 m. This is how much work is done on the box.
What is 405 J.
400
This is the height of a 35 kg object with a gravitational potential energy of 700J.
What is 2 m.
400
A model airplane with a mass of 4 kg is flying 15 m above the ground at 13 m/s. Suddenly, the engine fails, and it crashes. This is how fast it is moving when it hits the ground.
What is 21.7 m/s.
400
A 420 kg load of bricks is to be lifted up 120 meters in 5 minutes. This is how much power is required.
What is 1680 W.
500
This is the amount of work done on a box that moves 20 m and is pushed with a 350N horizontal force and has 120 N of friction force acting on it.
What is 460 J.
500
A 500 kg car goes over the top of a hill which is 40 m tall at 30 m/s. This is the car's total energy.
What is 425000 J.
500
This is how fast would a 0.036 kg bullet would have to be fired to go 125 meters into the air.
What is 50 m/s.
500
Calculate the amount of power Roy generates if his mass is 70 kg and he climbs a 3 meter staircase in 12 seconds.
What is 175 W