Laws of Motion Test

Result

Laws of Motion Test - 44

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

A body of mass M is kept on a rough horizontal surface (friction coefficient µ). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on the body is F, where

A

B

C

D

Solution
Question 2
4 / -1

What is the maximum value of the force F such that the block shown in the arrangement, does not move?

A
20 N

B
10 N

C
12 N

D
15 N

Solution
Question 3
4 / -1

A block P of mass m is placed on a frictionless horizontal surface. Another block Q of same mass is kept on P and connected to the wall with the help of a spring of spring constant k as shown in the figure. is the coefficient of friction between P and Q. The blocks move together performing SHM of amplitude A. The maximum value of the friction force between P and Q is

A

B

C
zero

D

Solution
Question 4
4 / -1

A body of mass m rests on horizontal surface. The coefficient of friction between the body and the surface is µ. If the mass is pulled by a force P as shown in the figure, the limiting friction between body and surface will be

A

B

C

D

Solution
Question 5
4 / -1

A 40 kg slab rests on a frictionless floor as shown in the figure. A 10 kg block rests on the top of the slab. The static coefficient of friction between the block and slab is 0.60 while the kinetic friction is 0.40. The 10 kg block is acted upon by a horizontal force 100 N. If g = 9.8 m/s², the resulting acceleration of the slab will be

A
0.98 m/s²

B
1.47 m/s²

C
1.52 m/s²

D
6.1 m/s²

Solution
Question 6
4 / -1

A block of mass 2 kg rests on a rough inclined plane making an angle of 30^o with the horizontal. The coefficient of static friction between the block and the plane is 0.7.The frictional force on the block is

A
9.8 N

B

C

D

Solution
Question 7
4 / -1

A circular disc with a groove along its diameter is placed horizontally. A block of mass 1 kg is placed as shown. The co-efficient of friction between the block and all surfaces of groove in contact is µ = 2/5. The disc has an acceleration of 25 m/s². Find the acceleration of the block with respect to disc.

A
10 m/s²

B
5 m/s²

C
20 m/s²

D
1 m/s²

Solution
Question 8
4 / -1

An insect crawls up a hemispherical surface very slowly (see the figure). The coefficient of friction between the insect and the surface is 1/3. If the line joining the centre of the hemispherical surface to the insect makes an angle α with the vertical, the maximum possible value of α is given by

A
cot α = 3

B
tan α = 3

C
sec α = 3

D
cosec α = 3
Question 9
4 / -1

When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts

A
In the backward direction on the front wheel and in the forward direction on the rear wheel

B
In the forward direction on the front wheel and in the backward direction on the rear wheel

C
In the backward direction on both front and the rear wheels

D
In the forward direction on both front and the rear wheels
Question 10
4 / -1

A small block of mass of 0.1 kg lies on a fixed inclined plane PQ which makes an angle θ with the horizontal. A horizontal force of 1N acts on the block through its centre of mass as shown in the figure. The block remains stationary if (take g = 10 m/s²)

A

B

C

D

Solution