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A boy is swinging a toy on a piece of string in a vertical circle. The toy has a mass of 150g & the radius of the circle is 0.8m. A. he swings the toy with a linear velocity of 2m/s will the toy move in a circle? Explain your answer.

a 4200 kg helicopter accelerate upward 3m/s^2. lift force is exerted by the air on the propellers?(g=10m/s^2)

A 90 kg fullback running east with a speed of 5.00 m/s is tackled by a 95 kg opponent running north with a speed of 3.00 m/s. If the collision is perfectly inelastic, calculate the speed and direction of the players just after the tackle. And determine th...

drive the equation of the work done by the torque

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