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A 90-kg merry-go-round of radius 2.0 m is spinning at a constant speed of 20 revolutions per minute. A kid standing on the ground decides to bring the merry-go-round to rest and applies a force of 10.0 N tangentially to the merry-go-round. If the merry-go-round is modelled as a solid cylinder, (A) calculate its moment of inertia. (B) What is the angular acceleration of the merry-go-round? (C) How many revolutions will the merry-go-round complete until it finally stops?
A 54 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.3m from the left end of the plan..
Refer to the Plastic Packaging case in. The ideal lip width is 1.5 in. The lip width data in Table 3.21 (in inches) were taken on the same bags represented in.
A cannon fires a 2-kg exploding projectile across a level field on a windless day. How far away from the cannon does the second piece land
The crest of a wave passes the 50 cm mark on a meter stick and, 7.99 seconds later, passes the 87.1 cm mark on the meter stick. What is the speed of the wave in m/s
Calculate the angular velocity? of an electron orbiting a proton in the hydrogen atom, given the radius of the orbit is 0.500x10-10 m . You may assume that the proton is stationary and the centripetal force is supplied by Coulomb attraction.
the mass of a string is 9.0 x 10-3 kg and it is stretched so that the tension in it is 240 n. a transverse wave
A ball is dropped from 13.6 ft above the ground. Assume that air-drag is negligible in this case. (a) At what height is half of its energy kinetic and half potential?
Calculate the flow velocity and the gauge pressure in such a pipe on the top floor. Assume no branch pipe and ignore viscosity
What are the products of complete combustion of hydrocarbons? What are the products of incomplete combustion? How are nitrogen oxides (NOx) formed, and what role do they play in air pollution?
a car driving on the turnpike accelerates uniformly from 84.0 ft/s (57.3 mph) to 112 ft/s (76.4 mph) in 3.60s. what is the cars acceleration
An earth satellite moves in a circular orbit with an orbitalspeed of 4300 m/s. Find the elevation of the satellite over the Earth surface
Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before releasing the hammer. What is the centripetal acceleration needed to rotate the hammer
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