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Q1. A 51-kg person on skis starts from rest down a hill sloped at 32° from the horizontal. The coefficient of friction between the skis and the snow is 0.12. After the skier had been moving for 5.0 s, the friction of the snow suddenly increased and made the net force on skier zero. What is the new coefficient of friction?
Q2. In outer space, far from other objects, block 1 of mass 30 kg is at position < 12, 8, 2 > m, and block 2 of mass 1350 kg is at position < 19, 8, 1 > m. What is the (vector) gravitational force acting on block 2 because of block 1? It helps to make a sketch of the situation.
A screen is placed 42.7 cm from a single slit that is illuminated with light of wavelength 677 nm. If the distance between the first and third minima in the diffraction pattern is 3.45 mm, what is the width of the slit.
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is at first at rest, then moves at a speed of 0.20 m/s along conveyor belt. What is the instantaneous power generated by this machine .
How much work is completed in charging the capacitor
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A skier starts from rest at the top of a hill that is inclined at 12.0° with the horizontal. The hillside is 180.0 m long, and the coefficient of friction between the snow and the skis is 0.0750. At the bottom of the hill, the snow is level and the c..
The latent heat of fusion
A rifle with a barrel length of 58 fires an 11 bullet with a horizontal speed of 370. The bullet strikes a block of wood and penetrates to a depth of 15.
Find out the altitude of the plane
Find out the coefficient of static friction
Discover the magnetic field on the z axis What happens if the block is immersed in carbon disulfide
What is the speed of crate hit ground
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