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Some sliding rocks approach the base of a hill with a speed of 18.0m/s . The hill rises at 40.0? above the horizontal and has coefficients of kinetic and static friction of 0.390 and 0.650, respectively, with these rocks. Start each part of your solution to this problem with a free-body diagram.
Find the acceleration of the rocks:
Find the acceleration of the rocks as they fall back down:
The human body can survive a negative acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250 m/s^2.
A vertical tube open at the top contains 5.2 cm of oil (density 0.82 g/cm^3) floating on 5.2 cm of water. Find out the gauge pressure at the bottom of the tube.
You are traveling on an airplane. The velocity of the plane with respect to the air is 110 m/s due east, What is the heading of the plane with respect to the ground
two point charges q and 2q lie on the x-axis . which regions on the x-axis include a point where the electric field due to the two point charges is zero?
what is the mass of helium in the balloon.
A 76 g, 40-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 10 g ball of clay travelling horizontally at 2.70 m/s hits and sticks to the very bottom tip of the rod. To what maximum angle, measured fro..
A 36.0 g bullet moving at 478 m/s strikes a 3.7 kg bag of flour that is on ice, at rest. The bullet passes during the bag, leaving at 255 m/s. How fast is the bag moving when the bullet exits.
Two packages at UPS start sliding down a ramp 40 degrees from the horizontal, Package A is sliding down in front of Package B. Package A has a mass of 3.50 and a coefficient of kinetic friction of 0.220. Package B has a mass of 8.00 and a coefficient..
An airplanes airspeed (relative to still air) is 135 mph. The wind speed relative to the ground is 37 mph and is directed at theta = 51 deg
A car traveling at 93km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.75 m. What was average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1.00g ..
A 200-kg crate is pushed horizontally with a force of 715 N. If the coefficient of friction is 0.20, compute the acceleration of the crate.
If the water in the river is flowing at 3.0 m/s, explain how long does it take the boat to make a round trip consisting of a 250 m displacement downstream followed by a 250 m displacement upstream?
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