If you push a large rock as hard as you possibly can, and the rock does not move……..did you use a force? Are you doing work?
What is you used a force, but you did not do work
100
If you switch an electric fan from low speed to high speed, the power
What is increases because the energy increases.
100
The total mechanical energy of an object is 2000 J. If the kinetic energy of the object is 500 J then the potential energy of the object is…..
What is 1500J
100
If you know the energy used by an electric light bulb, you can calculate its power by
What is dividing the energy by the length of time the bulb shines.
100
What type of car do I drive?
What is Jeep
200
Kara does work on a ball by kicking it. The work Kara does on the ball a. decreases the ball's mass and height, b. decreases the ball's energy, c. increases the ball's energy
What is increases the ball's energy
200
If you double the distance over which a force moves an object, then the work is multiplied by a. 2, b. 1/4, c. 3
What is 2
200
If Ron doubles his velocity, his kinetic energy is multiplied by …a. 1/2 b. 2 c. 4
What is 4, because you square velocity when figuring out kinetic energy
200
A factory machine does a set amount of work to a piece of metal. To increase the machine's power, the factory workers could...
What is increase the speed of the machine
200
How old will I be next month?
What is 30
300
What is the formula for gravitational potential energy?
What is GPE=mgh
300
A mountain climber stops on a level area half way up a mountain. What can he do next to increase his gravitational potential energy?
What is climb higher
300
At the top of the hill, a roller coaster car has a mechanical energy of 90,000 J. At the bottom of the hill, the car's mechanical energy is
What is equal to its mechanical energy at the top of the hill
300
calculate work… distance is 30 m and force is 48 n
What is 720 J
300
Which period do I have my plan?
What is 7C or 3rd
400
Would your power change if you climbed the ladder faster?
What is yes because the work is being done faster.
400
How can you find out how much work you do when you climb a ladder?
What is find the force you used to climb the ladder in newtons and distance you climbed the ladder in meters. Multiply those two numbers together.
400
Look at the board. Which car has the most gravitational potential energy.
What is the car at the highest point.
400
Look on the white board. Which car has the greatest kinetic energy