Question

a body is projected in a vertical direction. the altitude y is given by y =10t^2 -9t+5 . Calculate the initial velocity of the body.​

Answer 1

Answer:

-9 units/sec

Explanation:

y=10t^2-9t+5

After differentiation,

dy/dt= 20t-9

At t=0, Velocity = -9 units/sec