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As a part of a New Year's celebration, a boy is needed to cause a wheel adorned with sparklers to spin rapidly. To accomplish this, the boy wound a 6 m long rope around the 13 cm diameter axle of the wheel. Since the wheel and axle (moment of inertia 25 kgm^2) system was at rest at the top of the tower, once the sparklers were lit, the boy (74kg) dropped off the tower while holding the end of the wound rope and spinning the wheel as he descended. What was the wheel's angular velocity when the rope was completely unwound and the boy was in free fall?
In a circus act, a 60 kg clown is shot from a cannon with an initial velocity of 14 m/s at some unknown angle above the horizontal. What is the kinetic energy of the clown as he lands in the net
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axel through the center of the disk. the platform has a mass of 150 kg a radius of 2m and a rotational inertia of 30 kgm about the axis of ..
A 25kg child stands on the rim of a 200 kg merry-go-round that has a radius of 3 m. what is the new angular velocity of the merry-go-round
q1. a driver in a car travelling at a speed of 58.0 mih sees a deer 126 m away on the road. calculate the minimum
Suppose the space shuttle is in orbit 320km from the Earth's surface, and circles the Earth about once every90.9 minutes. Find the centripetalacceleration of the space shuttle in its orbit. Express your answerin terms of g, the gravitational accel..
A ball is attached to a horizontal cord of length L whose other end is fixed. A peg is located at a distance d directly below the fixed end of the cord. The ball is released from rest when the string is horizontal. ?
A flute player hears four beats per second when she compares her note to the 523 tuning fork (the note C). She can match the frequency of the tuning fork by pulling out tuning joint to lengthen her flute slightly. What are the three possible value..
Charge is distributed uniformly throughout the volume of an infinitely long cylinder of radius R = 1.00×10-2 m. The charge density is 1.00×10-1 C/ m3. What is the electric field at r = 5.00×10-3 m? What is the electric field at r = 2.00×10-2 m?
Constructive interference of sound waves occurs when:
A child's toy consists of a piece of plastic attached to a spring in the figure below. The spring is compressed against the floor a distance of 2.00 cm, estimate the force constant of the spring
Discuss in detail why it might be dangerous to microwave raw eggs with their shell intact using the concepts learnt today (Hint: pV = nRT).
calculate the force p required to drag the block of mass 2 kg up the hill of angle 30 degrees at a constant velocity b
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