Question

A bullet fired in a space is travelling in a straight line and its equation of motion is s(t) = 4t +
t
2
. If it travels for 15 seconds before impact find the instantaneous velocity at the 11th second?

Answer 1

Answer:

no it will change its direction

Answer 2

Explanation:

S=4t+t²

instantaneous velocity =ds/dt

v=d(4t+t²)/ds=4+2t

when t=15s

v=34m/s

t=11s

v=26m/s

inst velocity at 11th sec=v(15)-v(11)=34-26=8m/s