Question

A force of 5kg acts on a body for 10 seconds .If the velocity varies 5m/sec due to force , the mass of the body is-

Answer 1

Force *time = mass * change in velocity
so
F*t=m*dv
m=F*t/dv
m=5*10/5
m=10kg

Answer 2

Answer:

Answer:

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Apply equation of kinematic

v=u+at

Acceleration, a=$\frac{v - u}{t}$

=$\frac{25 - 10}{20}$

=0.75m${s}^{ - 2}$

Force= mass x acceleration

F=5×0.75=3.75N

Hence, force is 3.75N