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A 400-kg piano slides 3.6 m down a 28 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline.
Determine the force exerted by the man and the work done on the piano by the man.
A 0.2kg steel ball is dropped straight down onto a hard horizontal floor and bounces straight up. Determine the magnitude of the impulse delivered to the floor by the steel vessel
A positive charge q1 = 2.50 µC on a frictionless horizontal surface is attached to a spring of force constant k, the distance between charges to d = 9.00 cm, Find the value of k
A 25000 kg rocket ship accelerates upwards by reason of constant 1.25MH of thrust from its engine. A simple pendulum on the ship is observed to complete 100 full swings in 75 seconds. What is the length of string.
A horizontal aluminum rod 4.8 cm in diameter projects 5.6 cm from a wall. A 1200 kg object is suspended from the end of the rod. Find the vertical deflection of the end of the rod
A hand grenade is thrown with a speed of v0 30 m/s, and a 60 degree angle with x-axis, just prior to exploding. Find the velocity of the other piece after the explosion
rate at which mechanical energy is transferred to the turbine blades, assuming 60 percent efficiency.
A 1200 kg car is traveling at a constant speed of 13 m/s up a hill that makes a constant angle with the horizontal. How much energy is dissipated by dissipative forces in one second
A 2.00m -long, 550g rope pulls a 13.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.20m/s2 . How much force pulls forward on (a) the ice, (b) the rope?
A pendulum consists of a mass m suspended from a fixed point by means of a string of length b and is immersed in a viscous medium. Find its velocity and angular displacement at a later time
What is the propotion of the mass of these excess electrons to the mass of the penny.
A herd of wild horses races across the flat, open plains of the Great Basin in central Nevada. If the horses are running at 12.1 m/s at a compass heading of 286 degrees, illustrate what is the northward component of their velocity?
the final equilibrium temperature of the tin- water mixture.
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