Question

17. What will happen if to a ball on a string if the string brea what speed? l happen if to a ball on a string if the string breaks? What direction will it move, and al erseus want to attack a cyclops with a rock and sling. He uses a.8-kg rock to a string so that he can swing it in a circle above his head. The strine is 75 meters long and while swinging, the rock makes revolutions each second. 18. Calculate the period of the rock. 19. Calculate the speed of the rock. 20. Calculate the centripetal acceleration of the rock. 21. Calculate the force of the rock. 22. A ball is whirled on a string, then the string breaks. What causes the ball to move oft in a straight line? 23. What is the radius of a generator that spins at 45 m/s around an axle which allows for 1.8 m/s in the generator's motion? 24. A 65 kg child moves with uniform circular motion while riding a horse on a carousel. The horse is 22 m from the carousel's axis of rotation and has a tangential speed of 3.6 m/s. What is the child's centripetal acceleration? 25. What is the centripetal force on the child in item 262 26. What amount of time is needed for a ferris wheel to make one full circle if it moves at 4.5 m/s and the edge of the wheel is 2.5 m from the rotational axis?

Answer 1

17. The force needed to keep the ball moving in a circle is provided by the string. when the string breaks the ball moves in a straight line with a tangential velocity $v = r\omega$.

string breaks 00)