Unit C Assessment

 

A 0.160-kg ball attached to a light cord is swung in a vertical circle of radius 70.0 cm. At the top of the swing, the speed of the ball is 3.26 m/s. The centre of the circle is 1.50 m above the floor.

  1. Draw a free-body diagram of the forces on the ball at the top of the swing.

  2. Calculate the magnitude of the tension in the cord at the top of the swing.

  3. Calculate the mechanical energy of the ball at the top of the swing with respect to the floor.

  4. Calculate the speed of the ball when the cord is 30.0° down from horizontal.

  5. Determine the magnitude of the tension in the cord when the cord is 30.0° down from horizontal.

Submit your answers to your teacher for marks.