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WorksheetsQUIZ 3 (TOPIC 4-WORK,ENERGY AND POWER)
Total questions: 10
Worksheet time: 8mins
Name
Class
Date
1.
The energy possessed by body due to its position is called
a)
kinetic energy
b)
potential energy
c)
nuclear energy
d)
electrical energy
2.
The principle of conservation of energy state that
a)
In an isolated system, total energy is conserved.
b)
Kinetic energy is always equal to the potential energy
c)
The net work done on the system equals the change in kinetic energy
d)
Energy can be created and destroyed, it can only be transferred or changed from one form to another
3.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = Time/distance
d)
P = Time/Work
4.
The work–kinetic energy theorem stated that
a)
work done on an object is equals to the change in its kinetic energy
b)
work done on an object comes from the kinetic energy.
c)
work and kinetic energy are the same thing.
d)
work and kinetic energy cannot co–exist at the same time
5.
FIGURE shows an object placed on a table. It is observed that normal force, N and gravitational force, mg both do no work to the object. This is because
a)
W=Fs cos θ and θ is 90°, hence work is zero
b)
W=Fs cos θ and θ is 0°, hence work is zero
c)
W=Fs sin θ and θ is 90°, hence work is zero
d)
W=Fs sin θ and θ is 0°, hence work is zero
6.
When a body slides against a rough horizontal surface, the work done by friction is
a)
positive
b)
zero
c)
negative
d)
constant
7.
Which is the unit for work done?
a)
Nm−1
b)
W
c)
Ns
d)
J
8.
Kinetic energy depends on the
a)
mass and height.
b)
mass and speed.
c)
height and speed.
d)
mass and gravity
9.
On a plot of graph force against displacement (F-s), what represents the work done by the force F?
a)
the area under the curve.
b)
the slope of the curve.
c)
the length of the curve.
d)
the product of the maximum force times the maximum displacement.
10.
If you push twice as hard against a stationary brick wall, the amount of work you do
a)
halved.
b)
remains constant but non-zero.
c)
doubled.
d)
remains constant at zero.
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