Physics Question

Question

You’re riding a toboggan down an icy run to a frozen lake, and you accelerate the 62 kg combination of you and the toboggan from 1.2 m/s to 4.9 m/s in 1.2 s. How much power does that require?

Answer 1

Consider the following...

The definition of power is the rate of work (P=W/t).

Since work causes a change in energy, it can also be defined as the rate of the change in energy (P=deltaE/t).

The only energy that the rider/toboggan have in this case is kinetic. So, the power is the change in kinetic energy divided by time.P=(Kf-Ki)/t