A1430 kg car speeds up from 7.50 m/s to 11.0 m/s in 9.30 s. ignoring friction, how much power did that require? (unit=w)

4982.8 W

Explanation:

Given the mass of the car = 1430 kg

initial speed = 7.5m/sec

final speed = 11.0 m/sec

time = 9.30sec

Assuming constant accelration a We know that

v=u+at

11=7.5+9.3a

a=0.376

We know that F=ma

F=

We know that

s= 86.10m

We know that work(W)=

W= = 46339.02J = 46.34KJ

We know that power= = KW

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.