WORK. A 2 kg mass is spun on a string in a horizontal circular path at a constant speed.

a. Draw the free-body diagram for the mass.

b. If the radius of the path is 0.5 m and the period of revolution is 0.25 s, what is the speed of the mass

c. What force is keeping the mass in a circular path?

d. What is the net force acting on the mass in the horizontal direction?

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Does anyone have the answers to online physics course plato course physics, semester a v3.0