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In a common but dangerous prank, a chair is pulled away as a person is moving downward to sit on it, causing the victim to land hard on the floor. Suppose the victim falls by 0.30 m, the mass that moves downward is 62.0 kg, and the collision on the floor lasts 0.0780 s. What are the magnitudes of the
(a) impulse and
(b) average force acting on the victim from the floor during the collision?
A 4.20 kg model rocket is launched, expelling 57.0 g of burned fuel from its exhaust at a speed of 675 m/s. What is the velocity of the rocket after fuel has burned.
Find the mans rate of sweat production
An air-track glider attached to a spring oscillates between the 16.31 cm mark and the 51.41 cm mark on the track. What is the maximum speed of the glider
A car rounds a 200 m radius curve at 10.5 m/s. If the horizontal force acting on the car is 790 N, what's the car's mass
A student from Sidney, Australia compares the distance he obtained from the 1-st spark mark to the 20-th spark mark, What difference in the results was found
A stunt pilot performs a circular dive of radius 715m. At the bottom of the dive pilot has a speed of 265 m/s which at that instant is increasing at a rate of 15 m/s2(along the direction of vector B) What total acceleration does the pilot have at ..
A 4.3-m-tall, 50-cm-diameter concrete column supports a 1.0×105{\rm kg} load. By how much is the column compressed
A rotating wheel requires 6.00 s to rotate 30.0 revolutions. What is the constant angular acceleration (in rad/s) of the wheel
given a sargent ideal gas cycle. All process ar quasi-static, and the heat capacities are constant. Prove that the thermal efficiency of an engine performing a cycle
A dockworker applies a constant horizontal force of 84.0\({\rm N}\) to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.5\({\rm m}\) in a time 4.80\({\rm s}\)
Coherent light with wavelength 591 passes by two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 from the slits. The first-order bright fringe is a distance of 4.84 from the center of the central bright f..
A ball of mass 0.200 kg has a velocity of ; a ball of mass 0.300 kg has a velocity of . They meet in a head-on elastic collision. Proof that the collision was elastic
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