Question

14.
A body of mass 2kg travels according to law
x(t) = pt + qt+ rt?
where p = 3 m/s, q = 4 m/s?, r = 5 m/s?.
The force acting on the body at t = 2 sec. is :-​

Answer 1

Answer:

Force=24N

Explanation:

mass M=2kg

velocity x(t)=pt+qt+rt=3t+4t+5t

acceleration a(t)=$\frac{dx(t)}{dt}$

a=3+4+5

a=12m/s^2

Force F=Ma=2*12=24N

Answer 2

Explanation:

anawer is 24N

3t+4t+5t=12t

a=12m/s^2

f=ma

= 2×12

=24N