Aball of mass 3.0 kg is tied to the end of a 75-cm length of string. the ball and string are swung in a circle in a vertical plane at constant speed v, which is the minimum speed necessary to keep the string taut at all times. the center of the circle is above the floor. suddenly, the string is released at the instant the ball is at point p, located half way from the top to bottom on the descending arc. after what span of time does the ball hit the floor?
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Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be
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A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?
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Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:
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An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.
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Aball of mass 3.0 kg is tied to the end of a 75-cm length of string. the ball and string are swung i...
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