The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground some distance away. The world record for the horizontal distance is 86.75 m, achieved in 1986 by Yuriy Sedykh. Ignore air resistance and the fact that the ball was released above the ground rather than at ground level. Furthermore, assume that the ball is whirled around a circle that has a radius of 2.45 m and that its velocity at the instant of release is directed 47.1° above the horizontal. Find the magnitude of the centripetal force acting on the ball just prior to the moment of release. Number i Units

The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground some distance away. The world record for the horizontal distance is 86.75 m, achieved in 1986 by Yuriy Sedykh. Ignore air resistance and the fact that the ball was released above the ground rather than at ground level. Furthermore, assume that the ball is whirled around a circle that has a radius of 1.53 m and that its velocity at the instant of release is directed 22.6° above the horizontal. Find the magnitude of the centripetal force acting on the ball just prior to the moment of release. Number i Units

A ball of mass m = 0.275 kg swings in a vertical circular path on a string of length L = 0.850 m as shown.  At the lowest point in its vertical path the ball is 1.5 m from the ground. If the string is cut when the ball is at the bottom of the string moving with a speed of 7.5 m/s, how far in the x-direction does the ball move before hitting the ground?

The figure below shows an object initially at point A traveling in the +x-direction. It turns in a circular path at constant speed until it is traveling in the +y-direction at point C. The quarter-circle arc from A to C is 245 m in length, and the particle moves from A to C in 38.0 s. Point B on the path is 35.0° below the x-axis. 0 35.0⁰ (a) What is the speed of the object (in m/s)? m/s Need Help? (b) What is the magnitude and direction of the acceleration when the object is at point B? (Enter the magnitude in m/s² and the direction in degrees counterclockwise from the +x-axis.) magnitude m/s² direction Read It counterclockwise from the +x-axis