Question

How much power is needed to accelerate an object with a mass of `5 kg` and a velocity of `3 m/s` at a rate of `12 m/s^2`?

Answer 1

`90W`

Explanation:

Mass of the object `m=5kg`
Initial velocity of the object `u=0`

Acceleratlon of the object `a=12ms^-2`

Final velocity of the object `v=3m/s`
If final velocity is gained ints then
`3=0+12*t=>t=1/4s`
Work done by the force W=
KE gained by the object
`1/2*m*v^2=1/2*5*3^2=22.5J`

Power needed `P=W/t=22.5*4J/s=90W`