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While running in a cross country meet, a member of women team of SJU dissipates about 0.35 Joule of mechanical energy per step per kilogram of her body mass. If she develops a power of 75Watt during the race and runs at a speed of 5m/s, determine what is her mass?
in a television set electrons are accelerated from rest through a potential difference of 19 kv. the electrons then
n 1730 kg car stopped at a traffic light is struck from the rear by a 865 kg car. The two cars become entangled, what is the change in kinetic energy
how long does it take the engine to lift the crate a vertical distance of 19.8 m? Friction in the system is negligible.
a rubber ball is shot straight up from the ground with speed v0. simultaneously a second rubber ball at height h
A proton is released from rest inside a region of constant, uniform electric field E1 pointing due North. 27.3 seconds after it is released, What is the ratio of the magnitude of E2 to the magnitude of E1
A 70-kg stunt pilot pulls out a drive while flying at 50 m/s. If he flies a circular path with a radius of 200 m, what force does his seat exert on him at the bottom of the path
a pump is used to empty a 4000 l wading pool. the water exits the 3.0-cm-diameter hose at a speed of 2.2 ms .how long
A laser with wavelength d/8 is shining light on a double slit with slit separation 0.3 {rm mm}. This results in an interference pattern on the screen a distance L away from the slits. We wish to shine a second laser, with a different wavelength, t..
Consider a rectangular metal loop of length of 0.15m and width of 0.08m. Determine the emf induced in the wire on the left side of the loop
In 0.181s, through a distance of 8.05 m, a test pilot's speed decreases from 88.9m/s to 0m/s. If the pilot's mass is 70 kg, how much work is done against his body.
a car sits in an entrance ramp to a freeway waiting for a break in the traffic. the driver sees a small gap between a
A bullet moving at 244 m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. What was the average acceleration of the bullet as it slowed
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