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One side of the roof of a building slopes up at 41.5°. A roofer kicks a round, flat rock that has been thrown onto the roof by a neighborhood child. The rock slides straight up the incline with an initial speed of 15.0 m/s. The coefficient of kinetic friction between the rock and the roof is 0.435. The rock slides 10.0 m up the roof to its peak. It crosses the ridge and goes into free fall, following a parabolic trajectory above the far side of the roof, with negligible air resistance. Determine the maximum height the rock reaches above the point where it was kicked.
A 11-g piece of Styrofoam carries a net charge of -0.85 ?C and floats above the center of a large, What is the charge per unit area on the plastic sheet
A 70,000 kg spaceship wants to orbit a tiny black hole at a height of 10,000 m. What speed should the captain tell the computer to set the spaceship for
A golf ball rolls off the top of a flight of concrete steps of total vertical height 2.40m. what is the bounce height on the fourth bounce
A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. estimate the speed of the bullet
The average density of the planet Neptune is 1644 kg/m3. The acceleration of gravity on its surface is 11.32 m/s2. Calculate the average radius of Neptune
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
An object is dropped from rest into a pit, and accelerates due to gravity at roughly 10 m/s2. How much deeper is the second pit, compared to the first pit
a box of mass m1kg slides 20sqrt2m down an incline plane of angle pi4 and kinetic friction is 12.what are the
A tuning fork with a frequency of 440 Hz is held just above the top of a uniform glass tube containing water. What is the speed of sound in air
mike jumps 1 m down onto a walkway. his downward motion stops in 0.020 seconds. if he forgets to bend his knees what force is transmitted to his leg bones
The pattern was recorded by using a neutron detector to measure the neutron internsity at different positions. determine how far the detector was behind the slits
A 83.55kg woman walked a 5k race in 53.33 minutes. How much power did it take to complete the race
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