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A merry-go-round is at rest before a child pushes it so that it rotates with a constant angular acceleration for 32.0 s. When the child stops pushing, the merry-go-round is rotating at 1.20 rad/s. How many revolutions did the child make around the merry-go-round while he was pushing it?
plan a free-body diagram of the wire and bird system. How much tension does the bird produce in the wire? Ignore the weight of the wire.what is the rotational inertia of the wheel.
At a dock, a crane lifts a 1200 kg container 30 m, swings it out over the deck of a frieghter, How much work is done by the crane on the container
An elevator has a downward acceleration of 1 m/s2. A person, having a weight of 800 N as measured by a scale at rest on the ground, steps on a scale in the elevator. What does the scale read? A) 0 N. B) Approximately 80 N. C) Between 80 N and 800 ..
An automobile engine slows down from 4260 rpm to 1080 rpm in 2.99 s. Calculate the total number of revolutions the engine makes in this time. Do not enter unit
An oscilloscope shows a steady sinusoidal signal of 5 Volt peak to peak, which spans 5 cm in vertical direction on the screen. What will be observed on the oscilloscope screen
q1. a projectile is launched from earths surface at a certain initial velocity at an angle above the horizontal
A 10-kg picture is held in place by two wires, the first hanging at 35.0° to the left of the vertical and the second at 45.0° to the right of the vertical. What is the tension (in N) of the first wire
A 1.8 kg ball of putty moving to the right has a head-on inelastic collision with the .50 kg putty ball moving to the left. If the combined blob doesn't move just after the collision, what can you end about the relative speeds of the balls before the..
The Earth is constantly being bombarded by cosmic rays, which consist mostly of protons. what is the total charge incident on the atmosphere
A pump discharges water at a rate 100kg/s with a guage pressure of 2atms. the flow is transported by a 10 cm diameter pipe up to an elevation of 5m
An object at rest in a coordinate frame suddenly explodes into three parts of equal mass m. Two parts move away at right angles to each other and with equal speeds |v|.
A current I flows in a semi-infinite straight wire along y = 2b, z = 0 from very large positive values of x to the point (0,2b,0), then around a semicircular wire centered upon (0,b,0) and in negative values of x in the z = 0 plane to the point (0,..
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