Find out the velocity of the mass:
A mass of weight 29.4 Newton is subjected into a time dependent force,
F(t) = (3t 3 + 5) along x direction. Find out the velocity of the mass after
3 seconds, if initial velocity = 4 metres per second.
Letting the impulse momentum equation during a period from 0 to 3 seconds
where, mass m = W/g = 29.4 /9.8 = 3 kg.
V(t = 0) = 4 m / sec
∴ V3 - 4 = 14
or, V3 after 3 seconds = 18 metres/sec along x direction.