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NEET|| JEE MAIN AND ADVANCED || MHT-CET
NEET || JEE M&A || MHT-CET || PHYSICS PREPARATION
NEET|| JEE MAIN AND ADVANCED || MHT-CET
NEET || JEE M&A || MHT-CET || PHYSICS PREPARATION
PHYSICS MODEL QUESTION WITH SOLUTION
Topic: Work, Energy Power, and Collision
1.If the unit of force and length each be
increased by four times, then the unit of energy is increased by
(a) 16
times (b) 8 times
(c) 2 times (d) 4 times
2.A man pushes a wall and fails to displace it.
He does
(a) Negative
work
(b) Positive
but not maximum work
(c) No work
at all
(d) Maximum
work
3.The same retarding force is applied to stop a
train. The train stops after 80 m. If
the speed is doubled, then the distance will be
(a) The
same (b) Doubled
(c) Halved (d) Four times
4.A body moves a distance of 10 m along a straight line under the action
of a force of 5 N. If the work done
is 25 joules, the angle which the
force makes with the direction of motion of the body is
(a) 0° (b) 30°
(c) 60° (d) 90°
5.You lift a heavy book from the floor of the
room and keep it in the book-shelf having a height 2 m. In this process, you take 5 seconds. The work done by you will
depend upon
(a) Mass of the book and time have taken
(b) Weight
of the book and height of the book-shelf
(c) Height
of the book-shelf and time taken
(d) Mass of the book, height of the book-shelf
and time is taken
6.A body of mass m kg is lifted by a man to a height of one meter in 30 sec. Another man lifts the same mass to
the same height in 60 sec. The work
done by them are in the ratio
(a) 1: 2 (b) 1: 1
(c) 2 : 1 (d) 4 : 1
7.A
particle is acted upon by a force of constant magnitude which is always
perpendicular to the velocity of the particle, the motion of the particle takes
place in a plane. It follows that
(a) Its velocity is constant
(b) Its acceleration is constant
(c) Its kinetic energy is constant
(d) It moves in a straight line
8.A man starts walking from a point on the surface of the earth (assumed smooth) and
reaches a diagonally opposite point. What is the work done by him
(a) Zero (b) Positive
(c) Negative (d) Nothing can be said
9.It is easier to draw up a wooden block along with an
inclined plane than to haul it vertically, principally because
(a) The friction is reduced
(b) The
mass becomes smaller
(c) Only a
part of the weight has to be overcome
(d) ‘g’ becomes smaller
10.Two bodies of masses 1 kg and 5 kg are dropped
gently from the top of a tower. At a point, 20 cm from the ground, both the bodies will have the same
(a) Momentum (b) Kinetic energy
(c) Velocity (d) Total energy
11.The potential energy of a certain spring when
stretched through a distance ‘S’ is
10 joule. The amount of work (in
joule) that must be done on this spring to stretch it through an additional
distance ‘S’ will be
(a) 30 (b) 40
(c) 10 (d) 20
12.Which one of the following is not a
conservative force
(a) Gravitational force
(b) Electrostatic
the force between two charges
(c) Magnetic
the force between two magnetic dipoles
(d) Frictional force
13.Work done in raising a box depends on
(a) How
fast it is raised
(b) The
strength of the man
(c) The
height by which it is raised
(d) None of
the above
14.A light and a heavy body have equal momenta.
Which one has greater K.E
(a) The
light body (b) The heavy body
(c) The
K.E. is equal (d) Data is incomplete
15.A body at rest may have
(a) Energy (b) Momentum
(c) Speed (d) Velocity
16.When work is done on a body by an external
force, its
(a) Only
kinetic energy increases
(b) Only
potential energy increases
(c) Both
kinetic and potential energies may increase
(d) Sum of
kinetic and potential energies remain constant
17.A rifle bullet loses 1/20th of its
velocity in passing through a plank. The least number of such planks required
just to stop the bullet is
(a) 5 (b) 10
(c) 11 (d) 20
18.A light and a heavy body have equal kinetic
energy. Which one has a greater momentum?
(a) The light body
(b) The
heavy body
(c) Both
have equal momentum
(d) It is not possible to
say anything without additional information
19.If the linear momentum is increased by 50%,
the kinetic energy will increase by
(a) 50% (b) 100%
(c) 125% (d) 25%
20.A free body of mass 8 kg is traveling at 2 meter
per second in a straight line. At a certain instant, the body splits into two
equal parts due to an internal explosion which releases 16 joules of energy. Neither part leaves the original line of motion
finally
(a) Both parts continue to move in
the same direction as that of the original body
(b) One part comes to rest and the
other moves in the same direction as that of the original body
(c) One part comes to rest and the
other moves in the direction opposite to that of the original body
(d) One part moves in the same direction
and the other in the
ANSWER SHEET
1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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a
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c
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d
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c
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b
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b
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c
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a
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c
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c
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11
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12
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13
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14
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15
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16
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17
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18
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19
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20
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a
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d
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c
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a
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a
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c
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c
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b
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c
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b
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