Question

force of 2 n acting on a body changes its velocity uniformly from 2 metre per second to 5 M per second in 10 seconds calculate the mass of the body

Answer 1

F = mdv/dt
m = Ft/(v - u)
m = 2 * 10 / (5 - 2)
m = 20/3
m = 6.66 kg
Mass of the body is 6.66kg

Answer 2

Hey Tina..
your answer is here
given that velocity is change frm 2m/s to 5m/s in 10sec.
thus acceleration of body is (5-2)/10 =
3/10 m/s^2.
frm the equation of newton f = ma
we get m = f/a
m = 2/(3/10) = 20/3 kg
Thanks