You want to move your m = 29 kg spare tire from the floor onto the back of your pickup truck. the bed of your truck is h = 0.83 m above the floor. you have found a sturdy rope, and a strong plank to use as a ramp that is d = 2.6 m long. the coefficient of kinetic friction between the tire and the plank is μ.

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

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.