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A ball is placed on an edge of a cliff and it is kicked by a soccer player at 20.0 m/s at an angle of ? = 30? above the horizontal. The ball then lands 68 m away from the base of the cliff.
a. Find the time it took the ball the reach ground, from the instant it was kicked.
b. Find the height of the cliff.
The second ball, after rising, falls and also strikes the ground below. If air resistance can be neglected and if your downward and upward initial speeds are the same, explain how will the speeds of the balls compare upon striking the ground?
How many electrons are there in a tablespoon. Find the tension in each cable. right cable and left cable.
A 0.180 kg baseball, travelling 32.0 m/s, strikes catcher's mitt that recoils 13.0 cm in bringing the ball to rest. What was an average force (in newtons) applied by the ball to the mitt.
A cart carrying a vertical missile launcher moves horizontally at the constant velocity of 30.1 to the right. It launches a rocket vertically upward. The missile has an initial vertical velocity of 40.33 relative to the cart.
A 258-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.980, and the log has ..
Legend has it that, many centuries ago, Archimedes jumped out of his bathtub and ran across town naked screaming "Eureka!" after he solved an especially difficult problem.
A rifle has a mass of 4.5 kg and it fires a bullet of mass 11.6 g at a muzzle speed of 820 m/s. What is the recoil speed of the rifle as the bullet leaves the gun barrel
A 60 kg person drops from rest a distance of 1.20m to a platform of negligible mass supported by a stiff spring. The platform drops 6cm before the person comes to rest.
A 14 liter tank of helium is at a pressure of 164 kPa at a temperature of 0 C, What is the speed of the helium atoms in the tank at this new volume, How many moles of helium are there in the tank
A 0.390 kg iron horseshoe that is initially at 745 °C is dropped into a bucket containing 24 kg of water at 46 °C. What is the final equilibrium temperature? Overlook any heat transfer to or from the surroundings.
A bug is splattered on a car windshield. Evaluate the magnitude of the windshield's force on the bug to the magnitude of the bug's force on the windshield.
If the parachutist comes to rest with constant acceleration over a distance of 0.710 m, illustrate what force does the ground exerts on her?
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