a. An object is revolving in a vertical circle. Draw a free-body diagram and apply the dynamics of circular motion to write equations at i. at the top of the circle ii. at the bottom of the circle b. The ball is swung in the horizontal direction. What force must a person exert on a string attached to the 0.5 kg ball to make it revolve in a horizontal circle of radius 3.0 m. The ball makes 120 rpm. c. The 0.5 kg ball is swung in a vertical direction on the end of s 3.0 m long cord of negligible mass. i. what is the minimum speed at the top of the circle so that the ball continues to move in a circle, and ii. what is the tension in the string if the speed at the bottom is triple the speed at the top.

QUESTION 1 You swing a mass at the end of a sting in a vertical circle such that  the string remains taut at all times. Which of the following forces is the centripetal force acting on the mass when it is at the bottom of the circular trajectory?   a. the force of gravity   b. the tension in the string   c. the vector sum of the force of gravity and the tension   d. a force other than the force of gravity and the tension     QUESTION 2 A scale with a mass is placed inside an elevator. The scale reading will be the same when the elevator is moving at a constant velocity as when it is stopped.   True  False

Two balls, X and Y, are spun at a velocity of 6.5 m/s in a horizontal circle on the path shown below. Ball X has a mass of 1.3 kg, and ball Y has a mass of 0.81 kg. Which statement best describes the centripetal acceleration and centripetal forces on the balls? A. Both balls will experience equal centripetal force and centripetal acceleration. B. Ball X will experience greater centripetal force and greater centripetal acceleration. C. Ball Y will experience greater centripetal force, but ball X will experience greater centripetal acceleration. D. Both balls will experience the same centripetal acceleration, but ball X will experience greater centripetal force.

C. Which of Newton's Laws applies in reference to your body pulls to the right when the car turns to the left? 6. Describe what tangential velocity is in terms of swinging the bucket in a vertical circle and then letting the bucket go. 7. True or False: The centripetal force has the same direction as the centripetal acceleration. 8. Write the formula of cent etal acceleration in terms of tangential velocity. 9. Write the Formula of centripetal force in terms of tangential velocity.