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اختبار الكتروني درس Energy:Resources and Forms
اختبار الكتروني درس Energy:Resources and Forms
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تكرار
1
Who does work from the following cases?
A person pushes a wall
A person plays football
A person sleeps
A person studies,while he is sitting
2
A force of 10 newtons affects a body of mass 3 kg.to move it 5 m ,so the work done is .....joules
5
30
50
150
3
Food and fuel are sources of.......energy
chemical
mechanical
electric
sound
4
-..........is a permanent source of energy
Petrol
The Sun
Coal
Nuclear reaction
5
Chemical energy is stored in the......
car battery
stretched spring
raising of a load upwards
car lamps
6
Weight of the body on the Earth equals its.........
mass+gravity acceleration
mass×gravity acceleration
mass÷gravity acceleration
mass-gravity acceleration
7
Potential energy equals.....
weight×height
mass×height
weight×speed
no correct answer
8
An object of a mass2 kg .is moving at a speed of 4 m/s,so it has a kinetic energy equals .........joules
16
64
32
128
9
An object of 20 N weight and it is placed at a height of 5 m ,so its potential energy is........joules
50
150
100
200
10
Kinetic energy=.....
a
b
c
d
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