Question

1. A body of mass 5 Kg is moving with a uniform velocity of 10 m/s. It is acted upon

by a force of 20 N. What will be its velocity after 1s? Ans-14m/s

2. A force of 100 N acting on a certain mass for 4s gives it a velocity of 20 m/s. Find the

mass of the body if the body was initially at rest. Ans-20Kg

3. A force of 10 N produces an acceleration of 20 m/s2 on a mass m1 and an acceleration

of 30 m/s2 on a mass m2. What acceleration would the same force provide if both the

masses are tied together? Ans-12m/s2

4. A body of mass 2 Kg is kept at rest. A constant force of 6N starts acting on it. Find

the time taken by the body to move through a distance of 54m. Ans-6s

5. The velocity of a particle of mass 500g changes from 16 m/s to 24 m/s in four

seconds. Assuming that a constant force acts on it find the magnitude of the force.

Ans-1N

6. A motor car of mass 250 Kg is moving with a certain velocity. It is brought to rest by

the application of brakes, within a distance of 18 m when the average resistance being

offered to it is 1000N. What was the velocity of the motor car? Ans-12m/s

7. A body of 10 Kg is moving with the velocity of 5 m/s. Find the momentum

associated with the ball. Ans-50kg m/s

8. How much force is needed to produce an acceleration of 20 m/s2 in a body of mass

500 g? Ans-10N

9. A body of mass 2 Kg is moving with the velocity of 12 m/s. Find the momentum of

the body. Ans-24 kg m/s

10. A body of mass 4 Kg undergoes a change in speed from 30 m/s to 40 m/s. Calculate

increase in momentum. Ans- 40 kg m/s

11. How much force is needed to produce and exhilaration of 2.5 m/s2 in a body of mass

4.0 Kg? Ans-10 N

12. A force of 100N acts on a particle of mass 25 Kg. Find the acceleration of the

particle. Ans-4 m/s2

13. A force of 40 N acts on the most in 5 Kg fo 2s. Find the velocity acquired by the

body. Ans-16 m/s

14. A body of mass 2.5 Kg undergoes a change of velocity 10 m/s in 5s. What is the

force acting on it? Ans-5N

15.A force of 12N acts on a mass of 1.5 Kg at rest for 3s. Find the final velocity and the

movement of the body after 3s. Ans-24 m/s, 36 Kg m/s

16. A force of 20 N acting certain mouse for 2s gives it a velocity of 10 m/s. Find the

mass of the body if the body was initially at rest.

17. The velocity of a particle of mass 250 g changes to 10 m/s to 16 m/s in 3s.

that a constant force acts on it, find the magnitude of the force.

18. A Force of 6N acts on a body of mass 1.5 Kg for 2.0 s.Assuming the body to be

initially at rest find:

A) its velocity when the four stops acting,

B) the distance covered in five seconds after the force starts acting.
plz answer in brief ​

Answer 1

Answer:

M=5kg

a=tv−u

1V−10

f=20N

f=m×a

20N=5kg×(V−10)

4=(v−10)

v=14

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