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An average man can reach a maximum height of about 60 centimeter when jumping straight up from a crouched position. During the jump itself, the person's body from the knees up typically rises a distance of around 50 centimeter. To keep the calculations simple and yet get a reasonable result, assume that the entire body rises this much during the jump.
In terms of this jumper's weight W, find what force does the ground exert on him or her during the jump?
A child and sled with a combined mass of 52.8 kg slide down a frictionless hill that is7.17 m high. If the sled starts fromrest, what is its speed at the bottom of the hill
after being rubbed an object has acquired a charge of -1 nanocoulomb. choose the statement that is true only 1a. 6.25 x
On a clear day the electric ?eld in the atmosphere near the earth's surface is 100 N/C, What is the potential at the top of a man's head if the man is 2 m tall and is standing
A ball is thrown straight up in the air at an initial speed of 30 m/s. find the maximum height of the ball
an 9.0-kg object moving 5.0 ms in the positive x direction has a one-dimensional collision with a 3.0-kg object moving
the note middle c on a piano has a frequency of 512 hz in the fundamental tone. suppose that the string that produces
A soap bubble (with index of refraction 1.33) is floating in air. If the thickness of the bubble wall is 114 nm, what is the wavelength of the visible light that is most strongly reflected
a 196-g aluminum calorimeter contains 582 g of water at 18deg c. a 92-g piece of ice cooled to -18deg c is placed in
Computes the price per kwh for a 12-volt automobile battery with a 50 amp-hour capacity that sells for $40. If its weight is 45-lb, what is the energy density in watt-hours per lb.
A mass of 145 g of hot coffee at 90.0 oC is poured into an insulated cup containing 240 g of ice initially at 0.0 oC. How many grams of liquid will there be then
Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is negligible. The only resistance is from the moving rod, which is The rod has a cross-sectional area of m2 and moves with a..
A net force of 132 N acts on a baseball (m=140g) for a period of 0.045s. What is the magnitude of the change in momentum of the ball?
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