Force and Laws Of Motion -Test


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Question 1

Question:   Inertia is ________

1. a property of matter
2. a type of force
3. the speed of an object
4. none of the above

 Answer:   1

Question 2

Question:   A and B are two objects with masses 100 kg and 75 kg respectively, then ________ .

1. both will have the same inertia
2. B will have more inertia
3. A will have more inertia
4. both will have less inertia

 Answer:   3

Question 3

Question:   The resultant of balanced forces is ________

1. non zero
2. equal to zero
3. not equal to zero
4. equal to the acceleration produced in the body

 Answer:   2

Question 4

Question:   The physical quantity, which is the measure of inertia, is ________

1. density
2. weight
3. force
4. mass

 Answer:   4

Question 5

Question:   The sparks produced during sharpening of a knife against a grinding wheel leaves the rim of the wheel tangentially. This is due to ________

1. inertia of rest
2. inertia of motion
3. inertia of direction
4. force applied

 Answer:   3

Question 6

Question:   The law that gives a qualitative definition of force is ________

1. Newton's second law of motion
2. Law of inertia
3. Newton's third law of motion
4. Law of gravitation

 Answer:   2

Question 7

Question:   Name the property of matter due to which a body continues in its state of rest or uniform motion unless an external force acts on it.

1. Inertia
2. Elasticity
3. Viscosity
4. Density

 Answer:   1

Question 8

Question:   The S.I. unit of force is

1. erg
2. joule
3. newton
4. dyne

 Answer:   3

Question 9

Question:   When a force of 1N acts on a mass of 1kg that is free to move, the object moves with

1. a speed of 1 m/s
2. a speed of 1 km/s
3. an acceleration 10 m/s2
4. an acceleration of 1 m/s2

 Answer:   4

Question 10

Question:   The acceleration in a body is due to

1. balanced force
2. unbalanced force
3. mass
4. electrostatic force

 Answer:   2

Question 11

Question:   When an object undergoes acceleration

1. its speed always increases
2. its velocity always increases
3. it always falls towards the Earth
4. a force always acts on it

 Answer:   4

Question 12

Question:   A force of 10 N is acting on an object of mass 10 kg. What is the acceleration produced in it?

1.
2.
3. 100 m/s2
4. 100 m/s

 Answer:   1

Question 13

Question:   What is the force acting on an object of mass 10 kg moving with a uniform velocity of 10 m/s ?

1. 100 N
2. 10 N
3. 0
4. 1 N

 Answer:   3

Question 14

Question:   An athlete can take a longer jump if he comes running from a distance as compared to that when he jumps suddenly. Identify the type of inertia.

1. Inertia of rest
2. Inertia of motion
3. Inertia of direction
4. Inertia of position

 Answer:   2

Question 15

Question:   1 newton = ________

1.
2.
3.
4.

 Answer:   2

Question 16

Question:   The physical quantity, which is equal to change in momentum, is

1. force
2. impulse
3. acceleration
4. velocity

 Answer:   2

Question 17

Question:   The physical quantity, which is equal to rate of change of momentum, is

1. displacement
2. acceleration
3. force
4. impulse

 Answer:   3

Question 18

Question:   1kg m/s = _________.

1. 1 N s
2. 1 N
3. 1 N m
4. 10 N s

 Answer:   1

Question 19

Question:   An example for a vector quantity is __________

1. speed
2. momentum
3. distance
4. length

 Answer:   2

Question 20

Question:   Impulse = _________.

1.
2.
3.
4.

 Answer:   2

Question 21

Question:   SI unit of impulse is ___________.

1. N s
N s
2. N s2
3.
4.

 Answer:   1

Question 22

Question:   The momentum of a toy bus of 0.01 kg moving with a velocity of 5 m/s is

1. 0.005 kg m/s
2. 0.05 kg m/s
3. 0.005 N s
4. 0.5 kg m/s

 Answer:   2

Question 23

Question:   The product of mass and velocity is known as ____________ .

1. acceleration
2. force
3. momentum
4. velocity

 Answer:   3

Question 24

Question:   What is the momentum of a man of mass 100 kg when he walks with a uniform velocity of 2 m/s?

1.
2. 200 N
3.
4.

 Answer:   1

Question 25

Question:   The two factors on which the momentum of a body depends are ______ and _________ .

1. velocity, time
2. mass, weight
3. mass, distance
4. mass,velocity

 Answer:   4

Question 26

Question:   The gravitational force of earth acting on a body of mass 1 kg is _______.

1. 8.9 N
2. 9.8 N
3. 980 N
4. 1 N

 Answer:   2

Question 27

Question:   Momentum of a massive object at rest is _______.

1. very large
2. very small
3. zero
4. none of the above

Answer:   3

Question 28

Question:   The resultant of action and reaction forces is _______.

1. greater than zero
2. less than zero
3. zero
4. none of the above

 Answer:   1



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