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WorksheetsWork Topic 11 Matter and Energy
Total questions: 10
Worksheet time: 8mins
What is energy?
Energy doesn't exist
It is the capacity to burn coal
It is the ability to do work or to produce transformations
It is a property of the matter used to measure forces
The work depends on...
Force and distance
Force and displacement
Force and length
Force and thoughts
The principle of energy conservation states:
Energy can be created but not destroyed
Energy cannot be created, nor destroyed.
Energy can be destroyed but not created
What's the WORK value done by the external forces acting on a skater pushing off a wall?
W > 0 Joules
W < 0 Joules
W = 0 Joules
W ≠ 0 Joules
A weightlifter does no work on a barbell as long as he holds it stationary.
True
False
A weightlifter lowers a barbell to the floor. The work done is NEGATIVE.
True
False
A farmer hitches her tractor to a sled loaded with firewood and pulls it a distance of 20 m along level ground. The total weight of sled and load is 14,700 N. The tractor applies a constant 5000-N force at 36.9° of above the horizontal. A 3500-N friction force opposes the sled’s motion. Find the net work done.
100'000 J
79'968.47 J
294'000 J
70'000 J
9'968.47 J
You push your physics book 1.50 m along a horizontal tabletop with a horizontal push of 2.40 N while the opposing force of friction is 0.600 N. How much work is done?
2.7 J
0 J
0.9 J
3.6 J
A tow truck pulls a car 5.00 km along a horizontal roadway applying 850 N of force. How much work does the tow truck to move the car, if the car is inclined at 35° ?
3'481'396.18 J
3'481.40 J
4'250 J
4'250'000 J
