Question

MCQ with one or more correct answers.

1. The force required to produce an acceleration of 1ms–2 in a body of mass 1 kg is called

a) Newton b) Joule c) erg d) dyne [ ]

2. SI unit of force is [ ]

a) kg m2

s–2 b) kg ms–1 c) kg ms–2 d) kg m2

s–1

3. Relation between change in momentum and applied force is [ ]

a) Inversely proportional b) Directly proportional

c) F P   d) Can not be compared

4. Dimensional formula for force [ ]

a) [M0

L1

T–2] b) [M1

L1

T–1] c) [M1

L2

T–2] d) [M1

L1

T–2]

5. When a constant force is applied to a body it moves with uniform [ ]

a) Acceleration b) Velocity c) Speed d) Momentum

6. A force produces an acceleration of 10 ms–2, when acting on a body of mass 5 kg. The force

[ ]

a) 2N b) 0.5 N c) 50 N d) 5 N

7. Expression for rate of change of momentum [ ]

a) mv mu t   b)

t

mv mu 

c)

m v u  

t



d)

mv mu

t



8. A force of 100 N acts on a body of mass 10 kg the time taken by a to body changes its speed from

30 ms–1 to 40 ms–1 is [ ]

a) 10 s b) 1 s c) 0.1 s d) 100 s

9. A force of 50 N acting on a particle increases its velocity fro 10 ms–1 to 20 ms–1 in 5s. The mass of

the particle is [ ]

a) 2.5 g b) 0.25 kg c) 250 kg d) 25 kg

10. Force is a [ ]

a) Vector b) Scalar c) both a and b d) Any of these​

Answer 1

Answer:

1- a)

2- c)

3- b)

4- d)

5- a)

6- c)

7- mv-mu/t

8- b)

9- d)

10- a)

Answer 2

Answer:

3.joule is the si unit of force