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MOTION 1-D ASSIGNMENT
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Q.1 A body goes from A to B with a velocity of 20 m/s and comes back B to A with a velocity of 30 m/s. The average velocity of the body during the whole journey is
4 points
(A) Zero
(B) 25m/s
(C) 24 m/s
(D) None of these
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Q.2 Distance travelled by a freely falling body is proportional to :-
4 points
(A) mass of the body
(B) square of the acceleration due to gravity
(C) square of the time of fall
(D) time of all
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Q.3 The rate of change of displacement with time is: -
4 points
(A) speed
(B) acceleration
(C) retardation
(D) velocity
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Q.4 Which of the following is not vector quantity?
4 points
(A) Retardation
(B) Acceleration due to gravity
(C) Average speed
(D) Displacement
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Q.5 If the time-displacement graph of a particle is parallel to the time-axis then velocity of the particle is :-
4 points
(A) infinity
(B) unity
(C) equal to acceleration of the body
(D) zero
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Q.6 In the velocity-time graph, AB shows that the body has:-
4 points
(A) uniform acceleration
(B) non-uniform retardation
(C) uniform speed
(D) initial velocity OA and is moving with uniform retardation
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Q.7 In the given velocity-time graph, AB shows that the body has
4 points
(A) uniform acceleration
(B) uniform retardation
(C) uniform velocity throughout its motion and has zero initial velocity
(D) none of these
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Q.8 The velocity-time graph for a body with nonuniform motion is a
4 points
(A) straight line
(B) straight line parallel to x-axis
(C) straight line parallel to y-axis
(D) curved line
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Q.9 Area under a velocity-time graph gives
4 points
(A) time taken by a moving object
(B) distance travelled by a moving object
(C) acceleration of moving object
(D) retardation of a moving object
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Q.10 Which one of the following represents the time-displacement graph of two objects a and b moving with zero relative speed?
4 points
(A)
(B)
(C)
(D) none of these
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Q.11 If a body is thrown up with an initial velocity u and covers a maximum height of h, then h is equal to:-
4 points
(A) u²/2g
(B) u/2g
(C) 2u²g
(D) none of these
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Q.12 A body is thrown vertically upwards and rises to a height of 10 m. The velocity with which the body was thrown upwards is (g = 9.8 m/s²)
4 points
(A) 16 m/s
(B) 15 m/s
(C) 14 m/s
(D) 12 m/s
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Q.13 A truck running along a straight line increases its sped uniformly from 30m/s to 60m/s over a time interval 1 min. The distance travelled during this time interval is
4 points
(A) 900 m
(B) 1800 m
(C) 2700 m
(D) 3600 m
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Q.14 A car ravels 1/3 rd distance on a straight road with a velocity of 10km/hr, next 1/3 rd with velocity 20km/hr and the last 1/3 rd with velocity 60km/hr. What is the average velocity of the car in the whole journey ?
4 points
(A) 4 km/hr
(B) 6 km/hr
(C) 12 km/hr
(D) 18 km/hr
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Q.15 A stone is thrown vertically upward with an initial velocity u from the top of a tower, reaches the ground with a velocity 3u. The height of the tower is :-
4 points
(A) 3u²/g
(B) 4u²/g
(C) 6u²/g
(D) 9u²/g
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Q.16 If a ball is thrown up with a certain velocity. It attains a height of 40 m and comes back to the thrower , then :-
4 points
(A) total distance covered by it is 40 m
(B) total displacement covered by it is 80 m
(C) total displacement is zero
(D) total distance covered by it is zero
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Q.17 Acceleration of a body projected upwards with a certain velocity is
4 points
(A) 9.8 m/s²
(B) -9.8 m/s²
(C) zero
(D) insufficient data
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Q.18 The relationship between average speed, time and distance is
4 points
(A) Average speed = distance × time
(B) Average speed = total distance × total time
(C) Time = average speed / distance
(D) Distance = average speed × time
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Q.19 A rubber ball dropped from a certain height is an example of
4 points
(A) uniform acceleration
(B) uniform retardation
(C) uniform speed
(D) non-uniform speed
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Q.20 A car increases its speed from 36 km/hr to 72 km/hr in 10 s. Its acceleration is
4 points
(A) 1 m/s²
(B) 2 m/s²
(C) 3.5 m/s²
(D) 5 m/s²
Clear selection
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