Work Problems
A box is lifted vertically 1.5 m and is then held there. The box has a weight of 100 N. How much work is being done in holding the box in this elevated position?
150 Joules
A car with a mass of 700 kg is moving with a speed of 20m/s. Calculate the kinetic energy of the car.
140,000 Joules
A crane lifts a 75kg mass a height of 8 m. Calculate the gravitational potential energy gained by the mass (g = 9.8 N/kg).
5,880 Joules
"Windy City" is the nickname of what city in the US?
A. New York City
B. Los Angeles
C. Chicago
D. Boston
C. Chicago
A person pulls a block 2 m along a horizontal surface by a constant force F = 20 N. Determine the work done by force F acting on the block.
40 Joules
A cyclist and bike have a total mass of 100 kg and a speed of 15 m/s. Calculate the kinetic energy.
11,250 Joules
A ball with a mass of 5 kg is lifted onto a shelf which is 1.5m above the ground. Calculate the gravitational potential energy gained by the ball (g = 9.8 N/kg).
73.5 Joules
What color is Mickey Mouse's shorts?
A. Blue
B. Red
C. Green
D. Yellow
B. Red
Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find themselves getting a workout. They apply a cumulative force of 1080 N to push the car 218 m to the nearest fuel station. Determine the work done on the car.
235,440 Joules
A tennis ball is traveling at 50 m/s and has a kinetic energy of 75 J. Calculate the mass of the tennis ball.
0.06 kg
How much G.P.E. does a 5kg rock that is 10m above the ground has?
490 Joules
In Fahrenheit, what is the temperature that water freezes?
A. 0 degrees
B. 100 degrees
C. 55 degrees
D. 32 degrees
D. 32 degrees
Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 22.9 Newtons above the horizontal to drag his backpack a horizontal distance. The amount of work done is 550 Joules. How far did the bag travel?
(Round to two decimal places)
24.02 meters
A 500 kg truck has 4000 J of kinetic energy. How fast is it moving?
4 m/s
A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seat-top?
13.23 Joules
Which fish has no brain or heart?
A. Sunfish
B. Jellyfish
C. Snail
D. Shark
B. Jellyfish
A toy train is pulled across a track using 6700 Joules of work for a total of 10 meters. How much force was used?
670 Newtons
A car traveling at 10 m/s has 2000 J of kinetic energy. What is the mass of the car?
40 kg
A helicopter is flying at a height of 1.5 m. If it has 50 J of G.P.E., what is the mass of the helicopter?
(Round to one decimal place)
3.4 kg
World War II lasted for how many years?
A. 6 years
B. 7 years
C. 100 years
D. 12 years
A. 6 years