Afriend on skis stands still on level ground, with dry 0.00°c with a coefficient of static friction of 0.0300. how hard would you have to push your friend in the forward horizontal direction to move him if your friend weighs 685 n?

20.6 N

Explanation:

Friction equals normal force times coefficient of friction.

F = Fn μ

On level ground, normal force equal weight.

Fn = W

Therefore:

F = W μ

F = (685 N) (0.0300)

F = 20.6 N

the bal will not change its velocity.

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.