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A ball is thrown straight down from the top of a cliff with a speed of 5 m/s. The cliff-top is 20 m above ground level. Neglect the effects of air resistance.
A) How long is the ball in the air?
B) With what speed does the ball strike the ground?
A 4.22 box sits at rest at the bottom of a ramp that is 7.74 long and that is inclined at 40.0 above the horizontal. The coefficient of kinetic friction is 0.40, and the coefficient of static friction is 0.50.
A skier is accelerating down a 30.0° hill at a = 4.20 m/s^2. What is the vertical component of her acceleration
A ball of mass 0.1 kg is suspended vertically from the ceiling with a "massless" string and brought to rest. what will be the magnitude of the resulting angular acceleration
A 2.0kg wood block is launched up a wooden ramp that is inclined at a 33 angle. The block's initial speed is 14. What speed does it have when it slides back down to its starting point
Protons carry an electric charge ofe = 1.60×10−19 C, electronscarry a charge of −e, and neutrons are electricallyneutral. Protons and neutrons have a mass of1.67×10−27 kg, and electrons have a mass of9.11×10−31 kg.
The fastest martial arts punch is 43.3 mph (69.6 km/h) and was achieved by John Ozuna (United States), How much force was generated by his punch
A semi truck is stopped across a road. As a driver approaches at 20 m/s he sounds the horn of his car (f=350 Hz). find the frequency of the horn heard by the truck driver
A converging lens of focal length 7.930cm is 16.6 cm to the left of a diverging lens of focal length -6.0cm. A coin is placed 12.60cm to the left of the converging lens. Determine the location of the coin's final image.
Two objects (m1 = 2.15 kg and m2 = 4.30 kg) sit on a horizontal, frictionless surface and are pushed together with a compressed spring between them. How much energy was stored in the spring
The crankshaft in a race car goes from rest to 3300{\rm rpm} in 2.7{\rm s}. What is the crankshaft's angular acceleration
An object is placed 55.5 cm from a screen. Where should a converging lens of focal length 8.0 cm be placed to form an image on the screen, Find the magnification of the lens
Five grams of nitrogen gas at an initial pressure of 3.0 atm and at 20? C undergo an isobaric expansion until the volume has tripled. What is the gas volume after the expansion
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