Laws of Motion Test

Result

Laws of Motion Test - 41

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

When a body is moving on a surface, the force of friction is called

A
Static friction

B
Dynamic friction

C
Limiting friction

D
Rolling friction
Question 2
4 / -1

It is easier to roll a barrel than pull it along the road.
This statement is

A
False

B
True

C
Uncertain

D
Not possible
Question 3
4 / -1

A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 s. Then the coefficient of friction is

A
0.01

B
0.02

C
0.03

D
0.06

Solution
Question 4
4 / -1

A 60 kg weight is dragged on a horizontal surface by a rope upto 2 meters. If coefficient of friction is µ = 0.5, the angle of rope with the surface is 60^o and g = 9.8 m/sec², then work done is

A
294 J

B
315 J

C
588 J

D
197 J

Solution
Question 5
4 / -1

A car having a mass of 1000 kg is moving at a speed of 30 meters/sec. Brakes are applied to bring the car to rest. If the frictional force between the tyres and the road surface is 5000 newtons, the car will come to rest in

A
5 s

B
10 s

C
12 s

D
6 s

Solution
Question 6
4 / -1

If µ_s, µ_k and µ_r are coefficients of static friction, sliding friction and rolling friction, then

A
µ_s < µ_k < µ_r

B
µ_k < µ_r < µ_s

C
µ_r < µ_k < µ_s

D
µ_r = µ_k = µ_s
Question 7
4 / -1

A body is moving along a rough horizontal surface with an initial velocity 6 m/s. If the body comes to rest after travelling 9 m, then the coefficient of sliding friction will be

A
0.4

B
0.2

C
0.6

D
0.8

Solution
Question 8
4 / -1

A body moves along a circular path of radius 10 m and the coefficient of friction is 0.5. What should be its angular speed in rad/s if it is not to slip from the surface (g = 9.8 ms²)

A
5

B
10

C
0.1

D
0.7

Solution
Question 9
4 / -1

The backside of a truck is open and a box of 40 kg is placed 5 m away from the rear end. The coefficient of friction of the box with the surface of the truck is 0.15. The truck starts from rest with 2 m/s² acceleration. Calculate the distance covered by the truck when the box falls off

A
20 m

B
30 m

C
40 m

D
50 m

Solution
Question 10
4 / -1

A
At θ = 30⁰, the block will start sliding down the plan

B
The block will remain at rest on the plane upto certain θ and then it will topple

C
At θ = 60⁰, the block will start sliding down the plane and continue to do so at higher angles

D
At θ = 60⁰, the block will start sliding down the plane and on further increasing 0, it will topple at certain θ

Solution