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| Physics(Motion) Top 40 Important MCQ's For All Competitive Exam |
Motion
1.Who gave the theory of gravity?
(A) Charles Newton
(B) Charles Babbage
(C) Isaac Newton
(D) John Adams
Ans- C
2.If the position of object changes with respect to its surroundings in a given time. The object is said to be in
(a) motion
(b) rest
(c) only circular motion
(d) None of the above
Ans - A
3.Motion of a sliding body on an inclined plane is an example of
(a) rectilinear motion.
(b) circular motion.
(c) oscillatory motion.
(d) rotational motion.
Ans- A
4. Who among the following anticipated Newton by declaring that all things gravitate to the Earth?
(A) Aryabhatta
(B) Varahamihira
(C) Buddhagupta
(D) Brahmagupta
Ans- D
5. A reference frame attached to the earth
(a) is an inertial frame.
(b) cannot be an inertial frame because the earth is revolving round the sun.
(c) may be non-inertial frame.
(d) None of the above
Ans- A
6.Astronauts in space cannot stand erect. This is because, in space
(A) There is no gravity
(B) Viscous forces of the atmosphere are very strong
(C) Solar wind exert an upward force
(D) Atmospheric pressure is very low
Ans- A
7. In which of the following cases of motions, the distance and displacement are equal?
(a) If the car is moving an straight road.
(b) If the car is moving in circular path.
(c) The pendulum is moving to and fro.
(d) The earth is revolving around the sun.
Ans- A
8. As the object covers unequal distances in equal intervals of time, it is said to be in ......... motion.
(a) uniform
(b) linear
(c) non-uniform
(d) equilibrium
Ans- C
9. Speed of body is
(a) the distance covered by a moving body in unit time.
(b) always equal to velocity of body.
(c) a vector quantity.
(d) None of the above
Ans- A
10. The speed of an ant is 75 cm/sec. The ant travels in a day is
(a) 64800 m/day
(b) 648000 m/day
(c) 648000 cm/day
(d) 64800000 cm/day
Ans-B
11. Car travels from A to B at a speed of 40 km/h and returns back at a speed of 60 km/h. Its average speed will be
(a) 40 km/h
(b) 48 km/h
(c) 50 km/h
(d) 60 km/h
Ans-B
12.The speed of a particle or any instant of time is called its
(a) instantaneous speed
(b) instantaneous velocity
(c) displacement
(d) None of the above
Ans- A
13. The rate of change of displacement with time is called as ...... .
(a) force
(b) acceleration
(c) retardation
(d) velocity
Ans-D
14. The SI unit of velocity is
(a) m/sec
(b) m/sec 2
(c) m/sec 2
(d) m/sec 2
Ans-A
15. During ............. motion of an object along a straight line, the change in velocity of the object for any time
interval is zero.
(a) linear
(b) translational
(c) equilibrium
(d) uniform
Ans-D
16. Average velocity of an object
(a) is a scalar quantity.
(b) may be positive: zero or negative.
(c) is always positive.
(d) cannot be zero.
Ans-B
17.If the distance between the Earth and the Sun were twice what it is now, the gravitational force exerted on the Earth by the Sun would be
(A) Twice as large as it is now
(B) Four times as large as it is now
(C) One-fourth of what it is now
(D) Half of what it is now
Ans-C
18. If an object is falling from above, its weight remains
(A) Zero
(B) Same
(C) Change
(D) None of these
Ans-B
19. If pieces of equal size of woods, wax and iron falling from a same height, which one will reach the surface of the Earth first?
(A) Wood
(B) Wax
(C) Iron
(D) Reach at the same time
Ans -D
20.The weight of human body is
(A) Maximum at the poles
(B) Same at every place on the Earth’s surface
(C) Maximum at the equator
(D) More on the mountains than
planes
Ans-A
21. A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s2 What will be its velocity after 3 s?
(A) 9.8 m/s
(B) 19.6 m/s
(C) 29.4 m/s
(D) 39.2 m/s
Ans- C
22. If the radius of the Earth were to shrink by one percent, its mass remaining the same, the value of g on the Earth’s surface would
(A) Increase by 0.5%
(B) Increase by 2%
(C) Decrease by 0.5%
(D) Decrease by 2%
Ans- B
23. Weightlessness is
(A) Zero gravity
(B) When gravity decrease
(C) In vacuum
(D) None of the above
Ans-A
24. The time period of a pendulum
(A) Depends on the mass
(B) Depends on its length
(C) Depends on time
(D) Depends on temperature
Ans -B
25. Why do pendulum checks usually lose time in summer?
(A) Due to longer days in summer
(B) Due to friction caused by coils
(C) The length of the pendulum increases, increasing the time period of unit oscillation
(D) The weight of the pendulum change in summer
Ans-C
26. A girl is swinging on a swing in sitting position. When the girl stands up, the period of the swing will
(A) Be shorter
(B) Be longer
(C) Depends on the height of the girl
(D) Not change
Ans-A
27. A pendulum clock can run faster in
(A) Summer
(B) Winter
(C) Spring season
(D) Rainy season
Ans-B
28. Earth’s escape velocity is
(A) 15.0 km/s
(B) 21.1 km/s
(C) 7.0 km/s
(D) 11.2 km/s
Ans-D
29. What will happen if an object is thrown into space with the speed of 8 km/s?
(A) The object will go into space
(B) It will return to Earth
(C) It will rotate into the orbit of Earth
(D) It will burst out
Ans-B
30. A man is sitting in a train which is moving with a velocity of 60 km/h. His speed with respect to the train is
(a) 10/3m/s
(b) 60 m/s
(c) infinite
(d) zero
Ans-D
31. In negative acceleration, the velocity of a body ............ .
(a) is zero
(b) increases
(c) decreases
(d) remains constant
Ans-C
32. For a body moving with uniform acceleration its final velocity equals ........... .
(a) average velocity − initial velocity
(b) 2 × average velocity − initial velocity
(c) 2 × average velocity + initial velocity
(d) average velocity + initial velocity
Ans -B
33. The motion of a freely falling body is an example of ........... accelerated motion.
(a) non-uniformly
(b) uniformly
(c) uniquely
(d) specially
Ans-B
34. If the distance-time graph is a curve then it represents ........... .
(a) uniform speed
(b) constant displacement
(c) uniform momentum
(d) non-uniform speed
Ans-D
35. The distance-time graph for the motion of an object moving with a constant speed is a
(a) dot
(b) circle
(c) straight line
(d) curve
Ans - C
36. The slope of a distance-time graph shows .............. .
(a) acceleration
(b) momentum
(c) mass
(d) Speed
Ans -D
37. The displacement-time (s-t) graph of a particle acted upon by a constant force is
(a) a straight line
(b) a circle
(c) a parabola
(d) any curve depending upon initial conditions
Ans -C
38. If an object is at rest, then the time (X-axis) versus distance (Y-axis) graph
(a) is vertical
(b) is horizontal
(c) has 45° positive slope
(d) has 45° nega
Ans-B
39. The angle in which a cricket ball should be hit to travel maximum horizontal distance is
(a) 60° with horizontal.
(b) 45° with horizontal.
(c) 30° with horizontal.
(d) 15° with horizontal.
Ans-B
40. A ball is thrown upwards and it returns to ground describing a parabolic path. Which of the following remains constant?
(a) kinetic energy of the ball.
(b) speed of the ball.
(c) Horizontal component of velocity.
(d) Vertical component of velocity.
Ans -C
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