WorksheetsPractice Quiz-Work & Kinetic Energy
Total questions: 12
Worksheet time: 10mins
Determine whether work is being done in each of the following examples:
A. a train engine pulling a loaded boxcar initially at rest.
B. a tug of war that is evenly matched.
C. a crane lifting a car.
A
B
C
Units of work would be equivalent to a Newton times a meter.
True
False
Superman applies a force on a truck to prevent it from moving down a hill. This is an example of work being done.
True
False
An upward force is applied to a bucket as it is carried 20 m across the yard.
This is an example of work being done.
True
False
The brakes on a car do 240,000 J of work in stopping the car. If the car travels a distance of 40 m while the brakes are being applied, how large is the average force that the brakes exert on the car?
F = (a) N
The force needed to lift an object is equal in size to the gravitational force on the object. How much work is done in lifting an object that has a mass of 5 kg a vertical distance of 2 m? (g = 10 N/kg)
W = (a) J
A crane uses an average force of 5200 N to lift a girder 25 m. How much work does the crane do on the girder?
W = (a) J
A mechanic uses a hydraulic lift to raise a 1200 kg car 0.5 m off the ground. How much work does the lift do on the car? (g = 10 N/kg)
W = (a) J
The brakes on a bicycle apply 125 N of frictional force to the wheels as the bicycle travels 14.0 m. How much work have the brakes done on the bicycle?
W = (a) J
