Question

5. A force of 50 N acts on a stationary body of
mass 10 kg for 2s. The acceleration produced
in the body and velocity attained by it is
(a) 10 m/s
(b) 20 m/s
(c) 30 m/s (d) 40 m/s ​

Answer 1

Given

Force = 50N

mass = 5kg

time = 2s

we know that

Force = mass* acceleration

acceleration = 50/5 = 10m/s^2

Now

u = 0m/s

we know that

v = u + at

v = 20m/s

Answer 2

Answer:

A)10m/s

Explanation:

Acc. to Newton's law of motion

F = ma ........(1)

here , m = mass of body

a = acceleration

given. F = 50 N

m= 10

t = 2

so putting these values .... we can find out the acceleration from eq (1)

50 = 10 a

a = 50÷10 = 5

To find velocity we use formula of acceleration

a = velocity ÷ time

now put the values of a and t abd get velocity

5 = v ÷ 2

v = 5×2 = 10 m/s