WorksheetsPhysics - 6.2 - Work Done by a Constant Force
Total questions: 10
Worksheet time: 5mins
Of the following statements, identify which are using the scientific definition of work:
Jack had to work against time as the deadline neared.
Jill had to work on her homework before she went to bed.
Jack did work carrying the pail of water up the hill.
If your friend pushes a lawnmower four times as far as you do but exerts only half the force, which one of you does more work?
Your friend does more work; twice as much work.
You did more work; twice as much work.
Your friend does more work; four times as much work.
You did more work; four times as much work.
Of the following cases, choose the ones in which the work done on the second object is an example of positive work.
The road exerts a friction force on a speeding car skidding to a stop.
A rope exerts a force on a bucket as the bucket is raised up.
Air exerts a force on a parachute as the parachutists slowly falls to Earth.
Determine whether work is being done in the following example:
A train engine pulling a loaded boxcar initially at rest.
Yes
No
Determine whether work is being done in the following example:
A tug of war that is evenly matched.
Yes
No
Determine whether work is being done in the following example:
A crane hoisting a crate.
Yes
No
A person pushes a 1.50 x 103 N crate with a horizontal force of 345 N a distance of 24.0 m. Assume the coefficient of kinetic friction between the crate and the floor is 0.220.
How much work is done by the person on the crate?
8.28 x 103 Joules
-7.92 x 103 Joules
3.6 x 102 Joules
1.32 x 103 Joules
A person pushes a 1.50 x 103 N crate with a horizontal force of 345 N a distance of 24.0 m. Assume the coefficient of kinetic friction between the crate and the floor is 0.220.
How much work is done by the floor (friction) on the crate?
8.28 x 103 Joules
-7.92 x 103 Joules
3.6 x 102 Joules
1.32 x 103 Joules
A person pushes a 1.50 x 103 N crate with a horizontal force of 345 N a distance of 24.0 m. Assume the coefficient of kinetic friction between the crate and the floor is 0.220.
What is the net work done on the crate?
8.28 x 103 Joules
-7.92 x 103 Joules
3.6 x 102 Joules
1.32 x 103 Joules
A 0.075 kg ball in a kinetic sculpture is raised 1.32 m above the ground by a motor. A constant frictional force of 0.350 N acts in the direction opposite the motion. What is the net work done on the ball?
0.51 Joules
1.0 Joules
1.5 Joules
2.0 Joules
