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Q. A girl sits fixed on a merry-go-round of mass M = 500 kg and radius R = 2 m. The merry-go-round is initially at rest and is free to rotate without friction. The girl shoots a gun in a horizontal direction tangent to the outer edge of the merry-go-round. The bullet has mass m = 0.025 kg and a speed v = 700 m/s relative to the ground. The moment of inertia of the merry-go-round is I = MR2/2.
If you ignore the mass of the girl, what is the angular velocity ω of the girl and merry-go-round after the gun has been shot?
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A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 4.50 m/s in 0.852 s. What are the magnitudes of the linear impulse and the average total force experienced by a 65.0 kg passenger i..
An 845-N sled is pulled a distance of 173 m. The task requires 1.20 x 10^4 J of work and is done by pulling on a rope with the force of 142 N. At what angle is the rope held.
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