Work and Energy - Multiple Choice Test
Work and Energy - Multiple Choice Test
Question
1
Question: Work done = Force x _______
|
1.
|
distance
|
|
2.
|
acceleration
|
|
3.
|
velocity
|
|
4.
|
speed
|
Answer: 1
Question
2
Question: 1 joule = 1 _______
|
1.
|
N m2
|
|
2.
|
 |
|
3.
|
N m
|
|
4.
|
N2
m2
|
Answer: 3
Question
3
Question: Which form of energy does the flowing water
possess?
|
1.
|
gravitational
energy
|
|
2.
|
potential
energy
|
|
3.
|
electrical
energy
|
|
4.
|
kinetic
energy
|
Answer: 4
Question
4
Question: A body of mass 2 kg is dropped from a height of
1m. Its kinetic energy as it touches the ground is _______
|
1.
|
19.6 N
|
|
2.
|
19.6 J
|
|
3.
|
19.6 kg
|
|
4.
|
19.6 m
|
Answer: 2
Question
5
Question: The unit of power is _______
|
1.
|
watt per
second
|
|
2.
|
joule
|
|
3.
|
kilojoule
|
|
4.
|
joule per
second
|
Answer: 4
Question
6
|
1.
|
5
|
|
2.
|
2
|
|
3.
|
746
|
|
4.
|
6
|
Answer: 1
Question
7
|
1.
|
5 N
|
|
2.
|
50,000 Nm
|
|
3.
|
0
|
|
4.
|
1/5 N
|
Answer: 3
Question
8
Question: The P.E. of a body at a certain height is 200 J.
The kinetic energy possessed by it when it just touches the surface of the
earth is
|
1.
|
> P.E.
|
|
2.
|
< P.E.
|
|
3.
|
= P.E.
|
|
4.
|
cannot be
known
|
Answer: 1
Question
9
Question: Power is a measure of the _______
|
1.
|
rate of
change of momentum
|
|
2.
|
force
which produces motion
|
|
3.
|
change of
energy
|
|
4.
|
rate of
change of energy
|
Answer: 4
Question
10
Question: Two objects of masses 1 x 10-3 kg and
4 x 10-3 kg have equal momentum. What is the ratio of their kinetic
energies?
|
1.
|
4:1
|
|
2.
|
2:1
|
|
3.
|
16:1
|
|
4.
|
1 : 2
|
Answer: 1
Question
11
Question: A 40 newton object is released from a height of
10 m. Just before it hits the ground, its kinetic energy, in joules is _______
|
1.
|
400
|
|
2.
|
3920
|
|
3.
|
2800
|
|
4.
|
4000
|
Answer: 1
Question
12
Question: If the speed of an object is doubled then its
kinetic energy is _______
|
1.
|
doubled
|
|
2.
|
quadrupled
|
|
3.
|
halved
|
|
4.
|
tripled
|
Answer: 2
Question
13
Question: 1.5 kW = ______ watts
|
1.
|
1500
|
|
2.
|
150
|
|
3.
|
15000
|
|
4.
|
15
|
Answer: 1
Question
14
Question: A man of mass 50 kg jumps to a height of 1 m.
His potential energy at the highest point is (g = 10 m/s2)
|
1.
|
50 J
|
|
2.
|
60 J
|
|
3.
|
500 J
|
|
4.
|
600 J
|
Answer: 3
Question
15
Question: The type of energy possessed by a simple
pendulum, when it is at the mean position is
|
1.
|
kinetic
energy
|
|
2.
|
potential
energy
|
|
3.
|
potential
energy + kinetic energy
|
|
4.
|
sound
energy
|
Answer: 1
Question
16
Question: An iron sphere of mass 30 kg has the same
diameter as an aluminium sphere whose mass is 10.5 kg. The spheres are dropped
simultaneously from a cliff. When they are 10 m from the ground, they have the
same _______.
|
1.
|
acceleration
|
|
2.
|
momentum
|
|
3.
|
potential
energy
|
|
4.
|
kinetic
energy
|
Answer: 1
Question
17
|
1.
|
0.45 m/s
|
|
2.
|
1 m/s
|
|
3.
|
1.4 m/s
|
|
4.
|
4.4 m/s
|
Answer: 3
Question
18
Question: If air resistance is negligible, the sum total
of potential and kinetic energies of a freely falling body _______
|
1.
|
increases
|
|
2.
|
decreases
|
|
3.
|
becomes
zero
|
|
4.
|
remains
the same
|
Answer: 4
Question
19
Question: Name the physical quantity which is equal to the
product of force and velocity.
|
1.
|
work
|
|
2.
|
energy
|
|
3.
|
power
|
|
4.
|
acceleration
|
Answer: 3
Question
20
Question: An object of mass 1 kg has potential energy of 1
joule relative to the ground when it is at a height of _______.
|
1.
|
0.102 m
|
|
2.
|
1 m
|
|
3.
|
9.8 m
|
|
4.
|
32 m
|
Answer: 1
| Thank : http://www.tutorvista.com/content/science/science-i/work-energy/multiple-choice.php?g_q=work%20and%20energy%20test# | |||||||||
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