On Earth, the gravitational field strength is 10 N/kg. Calculate Ep for a 4 kg bowling ball that is being held 2 m above the ground.

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

At what time will the interfering waves have an amplitudeof zero?