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You are jumping down from a small ledge 0.7 m high onto a concrete floor. If you assume that your mass is 70 kg and your feet absorb the entire impact within 0.2 s, what is the force exerted onto your feet during the landing? (recall a = Delta-v/Delta-t)
A ladder base is 6m away from a house, and the fully extended ladder is 10m long when it leans against the house
Consider the circuit shown in the figure below, where C1 = 2.00 µF, C2 = 9.00 µF, and ?V = 18.0 V. Calculate the final charge on each capacitor
The position and momentum of a 3.01 keV electron are simultaneously determined, what is the minimum percentage uncertainty in its momentum
What is the speed of the river current. What is the swimmer's speed relative to the shore.
Descriube what are (a) the period of the motion, and the magnitude of her centripetal acceleration at (b) the highest point and (c) the lowest point?
What is the initial (horizontal) velocity of the ball. An airplane needs to reach a velocity of 203 km/h to take off. On a 2000 m runway, what is the least acceleration necessary for the plane to take flight.
A long pair of wires conducts 28.10 A of dc current to, and from, an instrument. If insulated wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field d = 11.2 cm from their midpoint, in their plane.
Compute what resolving power is needed to measure with a spectrograph the natural line width of the alpha particles from Po-212
Five seconds later, the police officer leaves on her motorcycle, starts her stopwatch, and accelerates at 2 m/s^2 toward the car. According to her stopwatch, how many seconds until she catches the car
A 23 bullet traveling 240 penetrates a 4 block of wood and emerges going 170. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
Consider a thin rod of mass 3.7 kg, length 1.8m and uniform density. The rod is pivoted at one end on a frictionless horizontal pin
A crate with a mass of 171.5 kg is suspended from the end of a uniform boom with a mass of 80.3 kg. The upper end of the boom is supported by a cable attached to the wall and the lower end by a pivot (marked X) on the same wall. compute the tensio..
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