chapter.3 force and motion MCQs with solution
chapter.3
force and motion
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1)
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A body covering equal displacement in equal interval of time possesses: a) Variable velocity b) Uniform acceleration c) Uniform velocity d) None of above |
C |
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2)
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Instantaneous and average velocities become
equal when
body: a) Has zero acceleration b) Has uniform velocity c) Has variable velocity d) Moves in a circle |
B |
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3)
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When velocity time graph is a straight
line parallel to time axis then: a) Acceleration is constant b) Acceleration is variable c) Acceleration is zero d)
Velocity is zero |
C |
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4)
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Slope of velocity time graph is: a) Acceleration b) Distance
c) Force d) Momentum |
A |
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5)
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The area between the velocity-time graph
and the
time axis is numerically equal to: a) Velocity b) Distance c) Time d) Acceleration |
B |
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6)
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If the slop of velocity-time graph
gradually decreases, then the body is
said to be moving with: a) Positive acceleration b) Negative acceleration c)
Uniform velocity d) Variable velocity |
B |
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7)
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If the slop of velocity-time graph gradually
increases,
then the body is said to be moving
with: a)
Positive acceleration b)
Negative acceleration c)
Uniform velocity d)
Variable velocity |
A |
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8)
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What is the shape of velocity time graph for constant acceleration? a)
Straight line b) Parabola c)
Inclined curve d) Declined curve |
A |
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9)
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When the object is moving towards earth, the value of “g” is taken as: a)
Positive b)
Negative c) Zero d)
None |
A |
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10) |
Change in momentum is called: a)
Force b) Impulse c)
Acceleration d) Torque |
B |
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11) |
The time rate of change of momentum is called: a)
Force b) Impulse c)
Acceleration d) Torque |
A |
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12) |
The property of a body due to which it opposes its state of rest or uniform
motion is called: a)
Momentum b) Inertia c)
Torque d) Weight |
B |
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13) |
Which law of motion is also called law of
inertia? a)
1st law b) 2nd law c) 3rd
law d) 4th law |
A |
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14) |
Inertia of an object is quantitative measure
of its: a)
Volume b) Density
c)
Mass d) Temperature |
C |
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15) |
Momentum depends upon. a) Force act on the body b)
Mass of the body c)
Velocity of the body d)
Both mass and velocity of the body |
D |
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16) |
An alternate unit to 𝑘𝑔 𝑚𝑠-1 is a) Js b) Ns c) Nm d)
N |
B |
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17) |
SI unit of impulse is: a) 𝑘𝑔 𝑚 𝑠 −2 b) 𝑁 𝑠 c) 𝑁 d) None of these |
B |
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18) |
The dimension of acceleration is. a) 𝐿𝑇 −1 b) 𝐿2 𝑇 −2 c) 𝐿2 𝑇 2 d) 𝐿 𝑇 −2 |
D |
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19) |
The dimension of force is. a) 𝑀𝐿𝑇 −2 b) 𝑀𝐿2 𝑇 −2 c) 𝑀𝐿2 𝑇 2 d) 𝑀𝐿−2 𝑇 −2 |
A |
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20) |
Which of the following pair has same
direction
always? a) Force, displacement b) Force, velocity c) Force, acceleration d) Force, momentum |
C |
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21) |
A snooker ball moving with velocity v
collides
head on with another snooker ball of same mass at rest. If the collision is
elastic,
the velocity of the second snooker ball is: a)
Zero b) Infinity c) V d) 2V |
C |
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22) |
Taking off rocket can be explained by. a)
1st law of motion b) 2nd
law of motion c)
Law of conservation of momentum d) Law
of conservation of energy |
C |
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23) |
The trajectory (or path) of a projectile is. a)
Straight line b) Parabola c)
Hyperbola d) Circle |
B |
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24) |
A football player will throw a football at
maximum
distance if the angle of projection is: a)
300 b) 450 c) 600 d)
900 |
B |
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25) |
Range of a projectile on a horizontal plane is
same for
the following pair of angles: a)
300 and 600 b) 200
and 800 c) 00 and 4500 d)
100 and 900 |
A |
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26) |
The velocity of projectile at its maximum height is: a) 𝑣𝑖 sin 𝜃 b) 𝑣𝑖 cos 𝜃 c) Maximum d) Zero |
B |
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27) |
Motion of projectile is _____________ dimensional. a) One b)
Two c)
Three d) Four |
B |
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28) |
During projectile motion, the horizontal
component
of velocity: a)
Changes with time b) Becomes zero c) Remains constant d) Increases with time |
C |
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29) |
The range of projectile is same for angles of projection: a) 30° and 45° b) 45° and 60° c) 50° and 45° d) 30° and 60° |
D |
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30) |
A ball of
iron of mass 2 kg is droped from the top of the building. The ball reaches
the ground in 10 s. twhat is te velocity in m/s wjem it strikes the ground: a. 150 b. 99 c. 49 d.
27 |
b |
Vf=vi
+at→vf=0+9.8 x 10 = 98 |
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31) |
A man alk
for some time with velocity v due east, then he walks for same time with
velocity v due north . the average velocity of the man is : a. 2v b. c. v d. v/ |
C |
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