Motion in a Straight Line Test

Result

Motion in a Straight Line Test - 48

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Weekly Quiz Competition

Question 1
4 / -1

If the velocity of a particle is (10 + 2t²) m/s, then the average acceleration of the particle between 25 and 5 s is

A
2 m/s²

B
4 m/s²

C
12 m/s²

D
14 m/s²

Solution
Question 2
4 / -1

A bullet moving with a velocity of 200 cm/s penetrates a wooden block and comes o rest after traversing 4 cm inside it. What velocity is needed for travelling distance of 9 cm in same block?

A
100 cm/s

B
136.2 cm/s

C
300 cm/s

D
250 cm/s

Solution
Question 3
4 / -1

A body falls freely from the top of a tower. If covers 36% of the total height in the last second before striking the ground level. The height of the tower is

A
50 m

B
75 m

C
100 m

D
125 m

Solution
Question 4
4 / -1

A thief is running away on a straight road in jeep moving with a speed of 9 ms. A police man chases him on a motorcyde moving at a speed of 10 ms^-1. If the instantaneous separation of the jeep from the motorcycle is 100 m, how long will it take for the police to catch the thief?

A
1 s

B
19 s

C
90 s

D
100 s

Solution
Question 5
4 / -1

A car A is travelling on a straight level road with a uniform speed of 60 km/hr. It is followed by another car B which is moving with a speed 0170 km/hr. When the distance between them is 2.5 km. the car B is given a deceleration of 20 km/hr². After how much time will B catch up with A?

A
1 hr

B
1/2 hr

C
1/4 hr

D
1/8 hr

Solution
Question 6
4 / -1

The speed of a body moving with uniform acceleration is u. This speed is doubled while covering a distance S. When it covers an additional distance S, its speed would become

A
√3 u

B
√5 u

C
√11 u

D
√7 u

Solution
Question 7
4 / -1

Two trains one of length 100 m and another of length 125 m, are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10 m/s. If their acceleration are 0.3 m/s² and 0.2 m/s² respectively, then the time they take to pass each other will be

A
5 s

B
10 s

C
15 s

D
20 s

Solution
Question 8
4 / -1

A body starts from rest with uniform acceleration. If its velocity after n second is p. then its displacement in the last two seconds is

A

B

C

D

Solution
Question 9
4 / -1

A point starts moving in a straight line with a certain acceleraLion. AL a time i after beginning of motion the acceleration suddenly becomes retardation of the same value. ‘the time in which the point returns to the initial point is

A

B

C

D
cannot be predicted unless acceleration is given

Solution
Question 10
4 / -1

A particle is moving in a straight line and passes through a point 0 with a velocity of 6 ms^-1. The particle moves with a constant retardation of 2 ms for 4 s and there after moves with constant velocity. How long after leaving C) does the particle return to 0?

A
3 s

B
8 s

C
Never

D
4 s

Solution