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One side of the roof of a building slopes up at36.5°. 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 is0.475. 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 home-run baseball is hit with an initial speed vo=37.0 m/s at an initial angle qo=53.1o. Find the time when the ball reaches the highest point of its flight, and find its height at this point
an alumanum disk is held between the poles of a power magnet and then pulled out. the person pulling on the disk feels
Sodium Chloride gas has molecules that are ionically bonded. The Sodium end has a charge of +1e, calculate the dipole moment
You are driving down the road when you see a deer in your headlights. It takes you 0.5 seconds to react. Once you react you start braking, and you decelerate at 3m/s2. What was your speed before you hit the brakes
Explain the working of arefrigerator and how the various parts are designed to enhance its working.
A point charge q1= +2.4 μC is held stationary at the origin. Find how much work is done by the electric force on q2
A bomb is designed to explode 2.00 s after it is armed. The bomb is launched from earth and accelerated to an unknown final speed. What is the final speed of the bomb just before it explodes
The pressure in ideal gas is cut in half slowly, while being kept in a container with rigid walls. In the process, 265 kJ of heat left the gas (a) how much work was done during the process. (b) what was the change in internal energy of the gas dur..
During a baseball game, a batter approaches the plate. The pitcher hurtles the ball in the direction of the batter at a speed of 85 miles per hour. find the momentum of the system in the center of mass frame
A model rocket fired vertically from the ground ascends with avertical acceleration of 3.6 m/s2 for 5.0 s. Its fuel is then exhausted, so itcontinues upward as a free-fall particle and then falls back down.
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. What is the pressure inside the cylinder during the fire
Marsha is pushing down and to the right on a 21-kg box at an angle of 30 below horizontal. The box slides at constant velocity across a carpet whose coefficient of kinetic friction with the box is 0.70.
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