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Q. After falling from rest from a height of 34 m, a 0.55 kg ball rebounds upward, reaching a height of 24 m. If the contact between ball and ground lasted 1.6 ms, what average force was exerted on the ball?
Q. A purse at radius 2.00 m and a wallet at radius 3.00 m travel in uniform circular motion on the floor of a merry-go-round as the ride turns. They are on the same radial line. At one instant, the acceleration of the purse is (2.10 m/s2) + (3.70 m/s2). At that instant and in unit-vector notation, what is the acceleration of the wallet?
A thin, circular disc is made of lead and has a radius of 0.0350 cm at 20.0 °C. find out the change in the area of the circle if the temperature is increased to 625.0 °C. The coefficient of linear thermal expansion for lead is 29.0 x 10-6/C°.
With what tension should a rope with length 3.00m and mass 0.135kg be stretched for transverse waves of frequency 43.0Hz to have a wavelength of 0.720m. What torque does friction exert even as this wheel is slowing down.
What is the ratio of the dynamic viscosity of air to that of water at standard pressure and a temperature of 20?C? Find the ratio of the kinematic viscosity of air to that of water for the same condition?
If a 200 lb bungee jumper jumps from a bridge 150 ft and touches the top of the river. If the cord absorbs 14 percent of the energy how far will be man be at the Top of the next bounce from the river bottom.
A student removes a 10.50 kg stereo from a shelf that is 1.802 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the work done by a) person and b) gravitational force that acts on the amplifier.
How much energy is transferred to the water as heat
An insulated Thermos contains 123 cm3 of hot coffee at 73 °C. You put a 12.0 g ice cube at its melting point to cool coffee. By how various degrees has your coffee cooled one time the ice has melted and equilibrium is reached? Treat the coffee as tho..
A 12.0 kg box resting on the horizontal, frictionless surface is attached to a 5.00 kg weight by a thin, light wire that passes without slippage over the frictionless pulley. The pulley has the shape of the uniform solid disk of mass 2.10kg and diame..
A 9.22 kg ball, hanging from the ceiling by the light wire 145.00 cm long, is struck in an elastic collision by a 1.20 kg ball moving horizontally at 6.46 m/s just before the collision.
A ball is thrown vertically upward with a speed of 1.63m/s from a point 4.21m above the ground. What is the time at which it will reach the ground.
A 70kg man walks out on a 10kg beam that rests on, but is not attached to, two supports. When beam just starts to tip, what is the force exerted on the beam by the right support.
As shown in the figure, sunlight is coming straight down (negative z-direction) on a solar panel (of length L = 1.51 m and width W = 0.930 m) on the Mars rover Spirit.
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