A 22kg box moves across a frictionless surface with a acceleration of 1.4 m/s^2 when a force is directed at 30 degrees above the horizon. What is the x component of push force? What is the applied force (hypotenuse)? What is the vertical component? What is the force of gravity? What is the normal force acting on the object?

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Photons with the highest energy have the longest period

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2