Asimple pendulum is made from a 0.952-m-long string and a small ball attached to its free end. the ball is pulled to one side through a small angle and then released from rest. after the ball is released, how much time elapses before it attains its greatest speed?

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?