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A playground Merry-Go-Round has a mass of 291 kg which can be viewed as being uniformly distributed over a disk of radius 2.4 m. The Merry-Go-Round is initially rotating at a rate of 0.6 rev/s. A 30 kg child then jumps on the rim without applying any tangential force. What is the new rotation rate assuming the child remains at the rim. Ignore frictional forces. Your answer should be given in rev/s to 3 decimal places.
What is final total energy of the system
A Mercedes-Benz 300SL (m = 1700 kg) is parked on a road that rises 20° above the horizontal. What is the magnitude of the normal force
The string connecting the m1 and the m2 passes over a light frictionless pulley. Given m1 = 1.77 kg, m2 = 7.24 kg, m3=2.23 kg, and g = 9.8 m/s2. The acceleration of gravity is 9.8 m/s2 . Find the downward acceleration of m2 mass.
The frequency and wavelength of a transverse wave on a string are 340 Hz and 0.70 m, respectively. what is the linear density of the string
A monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that three different wave-lengths are observed while the hydrogen relaxes back to the ground state. What is the wavelength of the incident beam.
A sound pulse has a power of 893.1 watts. It is radiating outwards from a point and at the time of observation is a radius of 7861.6 m from that point
A car is travelling at a constant speed of 32m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from ramp.
A stunt man (69.3 kg) swings across a valley at the end of a 28.2 m long rope. Find the tension in the rope at the bottom of the swing
A crate with a mass of 171.5 kg is suspended from the end of a uniform boom with a mass of 80.3 kg. The upper end of the boom is supported by a cable attached to the wall and the lower end by a pivot (marked X) on the same wall. compute the tensio..
The potential difference across a coil is 11V at an instant when the current through the coil is decreasing at a rate of 38A/s . What is the coil's inductance
A car races at a constant speed of 25 m/s around a circular track with a radius of 150 meters. what is the displacement between the starting and ending points
In compressing the spring in a toy dart gun, 0.9 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.05 kg, What is the dart's speed
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