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A 320 piano slides 3.4 down a 33 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure(Figure 1) ). The effective coefficient of kinetic friction is 0.40. Calculate the force exerted by the man. Calculate the work done by the man on the piano. Calculate the work done by the friction force. Calculate the work done by the force of gravity.
A blue ball is thrown upward with an initial speed of 23.2 m/s, from a height of 0.7 meters above the ground. 2.8 seconds after the blue ball is thrown, What is the speed of the blue ball when it reaches its maximum height
A -3.4 nC charge is on the x-axis at x1 = -7 cm and a 4.2 nC charge is on the x-axis at x2 = 13cm. At what point or points on the y-axis is the electric potential zero
Estimate the Doppler shift for a radio wave reflected from an airplane moving directly toward you at a speed of 298 m/s. Assume the radio wave has a frequency of 8.9 106 Hz
q1. the rate of energy use in a typical house is about 2 kw. if the kinetic energy of a car mass 1456 kg is equal to
Jamal pulls a 200N sled up a 28° slope at a constant speed by a force of 100N. Near the top of the hill he releases the sled, With what acceleration does the sled go down the slope
At 2500K hydrogen gas (H2) adds two more degrees of freedom to its motion. It has three translation motions, two rotational motions, What would be its kinetic energy per molecule
q1. determine the tension in each cable if the boat has a mass of 490 kg and the angle of each cable is 50 degrees from
A bullet of mass 0.01 kg moving horizontally strikes a block of wood of mass 1.5 kg which is suspended as a pendulum. What was the velocity of the bullet just before it struck the wooden block
Elucidate in detail the image of the "A" you would see as you look into the balloon with "A" facing you.
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. determine the recoil velocity
The wave is travelling to the right at 50.0 m/s. What is the amplitude if the highest displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m.
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
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