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A student (m = 63 kilogram) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0170 second. The average force exerted on him by the ground is +15000 N, where the upward direction is taken to be the positive direction. Evaluate from what height did the student fall? Suppose that the only force acting on him during the collision is that due to the ground. m
you shine red laser light with wavelength 670 nm through two narrow slits where the spacing between the slits is 0.005
A river flows due south with a speed of 2.30 . A man steers a motorboat across the river; his velocity relative to the water is 4.40. What is the velocity of the boat relative to the earth
A concave spherical mirror with a focal length of 15cm forms an upright image that is 5 times larger than the original object
Two soccer players start from rest, 30 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
A sprinter running the 100 m dash has a constant acceleration of 2.8 m/s2 for the first 4.1 seconds of the race, when he reaches his top speed, and then continues to run at that speed for the rest of the race. How long does it the sprinter to run t..
A projectile is launched at an angle of 33.69 degrees from the horizontal and lands down range at the same level. If the range of the projectile was 900 meters what was the maximum height
A homogeneous bar of length L can rotate on a horizontal frictionless plane around a vertical axis passing during one of its ends (moment of inertia I = ML2/3). It is at rest until a small bullet of mass m with velocity v perpendicular to the bar hit..
A projectile is shot from the edge of a vertical cliff 60.0 m above the ocean. How far from the foot of the vertical cliff does the projectile hit the water
a small ferryboat is 4.00 m wide and 6.00 m long. when a loaded truck pulls onto it the boat sinks an additional 4.20
An object is viewed through a 35 cm thick tank of water (n=1.33) at an angle of 30 degrees from parallel to the tank surface. what is the apparent displacement the object from its actual location
why has patient confidentiality become a more difficult issue to deal with in the present health care
a surveyors 30.0-m steel tape is correct at a temperature of 20.0 c. the distance between two points as measured by
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