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Two photons of light are released simultaneously at t = 0 in reference frame K, one from x = 0 and the other from x = 600 m, and travel towards each other along the x - axis. The two photons meet at a point x at time t as measured in frame K. Reference frame K' is moving at 0.95c in the positive x direction. The origins of frames K and K' coincide at t = t' = 0 and the clocks of the two frames are zeroed when the origins coincide. According to observers in K', the space and time coordinates (x', t') of the event when the two photons meet is:
- The figure below shows a ball of mass m = 0.2 kg attached to one end of a rod of length L 1.5 m and negligible mass which is free to rotate around a pivot through the other end. The ball is released from rest when the rod is horizontal as shown. At the bottom of its swing, the ball collides with a block of mass M 0.3 kg which is at rest on a frictionless table. The collision is completely inelastic (the ball and block stick together). After the collision, the ball/block = combination will continue to rotate around the pivot at the end of the rod. Find the vertical height above the table to which the ball/block combination rises.
is completely inelastic (the ball and ble . After the collision, the ball/block tion will continue to rotate around the p of the rod. Find the vertical height above which the ball/block combination rises. 0.2 kg 1.5 m Pivot 4 m 0.3 kg