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A ball moves in a circular path of 0.15 m diameter with a constant angular speed of 20 rev/ min. Its shadow performs simple harmonic motion on the wall behind it. Find the acceleration and speed of the shadow
a) at a turning point of the motion,
b) at the equilibrium position,
c) at a point 6 cm from the equilibrium position.
question a beam of light in air is incident on the surface of a slab of fused quartz. part of the beam is transmitted
A 60.0kg swimmer stands at the edge of a 200kg boat that is motionless on the water of a lake. calculate the velocity of the boat if friction between the boat and the water is neglected
A L = 1.33 m long metal rod Is pivoted from a point one third of the way along Its length. The rod has a mass of 0.464 kg. What period will the rod oscillate with when released from a small angle?
The pilot of an airplane wants to fly East in the presence of a 50 km/h wind with direction 60 degrees North of West as seen by a ground observer. Find the angle the plane must make respect to East
A truck is traveling at 13.1 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 15 ° with respect to the horizontal. The coefficient of kinetic friction between the tires and the road is 0.815. How far does the..
Presume an “anti-Lenz’s law” existed that meant a force was exerted to increase the change in magnetic field. Thus, when more energy was demanded, the force required to turn the generator would be reduced. What conservation law would be violated by t..
Charges Q1 = 6 x 18-8 C and Q2 = - 6 x 10^9 C are separated by 0.1m. What is the magnitude of the electric field midway between the two charges
How close to the edge of the 28.0 kg table, that is 2.2m with legs 1.2m apart, can a 62.0 kg person sit without tipping it over.
A skier of mass 79 kg starts from rest at the top of a hill that is inclined at 17.5° with the horizontal. The hill side is 205 m long, and the coefficient of friction among snow and skis is0.073. At the bottom of the hill, the snow is level and the ..
Astronomers determine that a nearby galaxy is moving toward our galaxy at a speed of 720.0 km/s with respect to the Earth, what was the wavelength emitted by the star
A copper rod 83.0 cm long and with a diameter of 1.3 cm is used to poke a fire. What is the rate of the heat flow through the rod
an object with a charge of -2.6 microc and a mass of 0.050 kg experiences an upward electric force due to a uniform
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