Question

11
Ans. (c) mass of the body
Numericals:
1. A body of mass 5 kg is moving with velocity
2 ms Calculate its linear momentum,
Ans. 10 kg m s
2. The linear momentum of a ball of mass 50 g is
0.5 kg m sl. Find its velocity.
Ans. 10 ms
3. A force of 15 N acts on a body of mass 2 kg,
Calculate the acceleration produced. Ans. 7.5 m s 2
4. A force of 10 N acts on a body of mass 5 kg. Find
the acceleration produced.
Ans. 2 m s-2
5. Calculate the magnitude of force which when applied
on a body of mass 0.5 kg produces an acceleration of
s-2.
Ans. 2-5 N
12
13
14
5 m
15
6. A force of 10 N acts on a body of mass 2 kg for
3 s, initially at rest. Calculate : (i) the velocity
acquired by the body, and (ii) change in momentum
of the body.
Ans. (i) 15 m s', (ii) 30 kg m s-1.
7. A force acts for 10 s on a stationary body of mass
100 kg after which the force ceases to act. The body
moves through a distance of 100 m in the next 5 s.
Calculate : (i) the velocity acquired by the body,
(ii) the acceleration produced by the force, and (iii)
the magnitude of the force.
Ans. (i) 20 m s', (ii) 2 m s?, (iii) 200 N​

Answer 1

Step-by-step explanation:

1.

momentum

=products of mass and velocity

=5*2

=10n

2.mass=50g=0.5kg

2. momentum

=product of mass and velocity

0.50=0.50*v

0.50/0.5=v

v=10m/s

3. f=ma

15=2*a

a=7.5m/s²

4. f=ma

10=5*a

a=2m/s²

7. v=100m

u=0

t=5

t2=10

m=100kg

v=u+at

100=0+10*5a

a=100/50

a=2m/s²

magnitude force'=ma

=100*2

=200n