Motion in a Straight Line Test

Result

Motion in a Straight Line Test - 31

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Weekly Quiz Competition

Question 1
4 / -1

The displacement-time graph for two particles A and B are straight lines inclined at angles of 30^o and 60^o with the time axis. The ratio of velocities of V_A : V_B is

A
1 : 2

B
1 : √3

C
√3 : 1

D
1 : 3

Solution
Question 2
4 / -1

A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms^–1. Assuming constant acceleration, the approximate time that it spends in the barrel after the gun is fired is

A
4 ms

B
40 ms

C
400 μs

D
1 ms

Solution
Question 3
4 / -1

A boy walks to his school at a distance of 6 km with constant speed of 2.5 km/hour and walks back with a constant speed of 4 km/hr. His average speed for round trip expressed in km/hour, is

A
24/13

B
40/13

C
3

D
1/2

Solution
Question 4
4 / -1

A particle moves along a semicircle of radius 10 m in 5 sec. The average velocity of the particle is

A

B

C

D

Solution
Question 5
4 / -1

The ratio of the numerical values of the average velocity and average speed of a body is always

A
Unity

B
Unity of less

C
Unity or more

D
Less than unity

Solution
Question 6
4 / -1

A person travels along a straight road for the first half time with a velocity v₁ and the next time with a velocity v₂. The mean velocity V of the man is

A

B

C

D
Question 7
4 / -1

Which of the following options is correct for the object having a straight line motion represented by the following graph?

A
The object moves with constantly increasing velocity from O to A and then it moves with constant velocity

B
Velocity of the object increases uniformly

C
Average velocity is zero

D
The graph shown in impossible
Question 8
4 / -1

The numerical ratio of displacement to the distance covered is always

A
Less than one

B
Equal than one

C
Equal to or less than one

D
Equal to or greater than one
Question 9
4 / -1

A particle moves for 20 sec with velocity 3 m/s and then velocity 4 m/s for another 20 sec and finally moves with velocity 5 m/s for next 20 sec. What is the average velocity of the particle?

A
3 m/s

B
4 m/s

C
5 m/s

D
Zero

Solution
Question 10
4 / -1

The correct statement from the following is

A
A body having zero velocity will not necessarily have zero acceleartion

B
A body having zero velocity will necessarily have zero acceleration

C
A bosy having uniform speed can have only uniform acceleartion

D
A body having non-uniform velocity will have zero acceleration