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Q. A student (m= 75kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.040s. the average force exerted on him by the ground is +18 000N, where the upward direction is taken to be positive direction. From what height did the student fall? Assume that the only force acting on him during the collision is that due to the ground.
The Earth can be approximated as a sphere of uniform density, rotating on its axis once a day. The mass of the Earth is 5.97×1024 kg, the radius of the Earth is 6.38×106 m, and the time of rotation for the Earth is 24.0 hrs.
What is final speed of the block
White light containing wavelengths from 405 nm to 760 nm falls on a grating with 8000 lines/cm. How wide is the first-order spectrum on a screen 2.20m away.
A Toyota Prius driving north at 61.0 {rm mph} and VW Passat driving south at 41.0 {rm mph} are on the same road heading along each other (but in different lanes). (We take the positive direction to be north.)
What is the linear speed of the phonograph needle
A small circular hole 7.00 in diameter is cut in the side of a large water tank, 25.0 below the water level in the tank. The top of the tank is open to the air.
A space traveler weighs 565 N on earth. What will the traveler weigh on another planet whose radius is 3 times that of earth and whose mass is twice that of earth.
Find the force exerted by the plane on the pilot
A pair of speakers separated by 0.820 m are driven by the same oscillator at a frequency of 652 Hz. An observer originally positioned at one of the speakers begins to walk along a line vertical to the line joining the speakers.
During 5 successive 0.97 min intervals, a runner moves at the following constant speeds: 0.436 km/min, 0.250 km/min, 0.160 km/min, 0.160 km/min, and 0.320 km/min. calculate the total distance traveled and the average speed.
A 67.3 kg sled starts at rest on a horizontal road. The coefficient of kinetic friction between the sled and the road is μk = 0.202. A man pulls the sled a distance 5.07 m along the ground by exerting a constant force of magnitude 532 N on a rope tha..
A jetliner is moving at a speed of 258 m/s. The vertical component of the plane's velocity is 85.8 m/s. find the magnitude of the horizontal component of the plane's velocity.
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