A boy throws a ball of mass 0.24 kg straight upward with an initial speed of 24 m/s. When the ball returns to the boy, its speed is 15 m/s. How much work (in J) does air resistance do on the ball during its flight

How is the ideal mechanical advantage of a wheel and axle calculated?

Acar of mass 800kg is moving at a speed of 2.2m/s.

Six pendulums of mass mand length las shown are released from rest at the same angle theta from vertical. rank the pendulums according to the numberof complete cycles of motion each pendulum goes through perminute. a. l= 1m m=2kg b. l= 4m m=1 kg c. l= 2 m m= 2 kg d. l= 1 m m= 4 kg e. l= 2 m m = 4 kg f. l= 4m m = 4kg