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Question: When starting a foot race, a 77 kilogram sprinter exerts an average force of 765 Newtons backward on the ground for 0.89 seconds. What is his final speed in meters/second at the end of this action?
2) An elevator filled with passengers has a mass of 1652 kilograms and moves upward at a speed of 7.4 meters/second for 1 seconds. Calculate the tension in the cable (in Newtons) supporting the elevator during this time.
Write the equation of a circle with a center at (0, 0) and a radius of 5. Show all work. Please type in the answer, instead of writing on a paper and scanning.
A tennis player standing 7.2 m from the net hits the ball at 2.42°above the horizontal. To clear the net, the ball should rise at least 0.153 m. If the ball now clears the net at the apex of its trajectory, how fast was the ball moving when it left t..
A solid cylider of mass 9.8 kg and radius 28 cm is yoked to a spring as shown. What is the angular frquency of the cylinder rolling back
Starting from rest, a 98 kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 800N, and his speed at the bottom of the pole is 3.2 m/s. How far did he slide down the pole.
a cylindrical tank having a radius 5 m and height h 5 m is filled with water with the top end of the tank exposed
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 192 N and is 3.1 m long. What is the tension in each rope
A 2.0 m-long cylindrical steel wire with a cross-sectional diameter of 4.0 mm is placed over a light, frictionless pulley, with one end of the wire connected to a 5.0 kg object and the other end connected to a 3.0 kg object. By how much does the w..
At a certain location, the horizontal component of the earth's magnetic field is 2.2 10-5 T, due north. Find the speed of the proton
A ball is thrown toward a cliff of height (h) with a speed of30 m/s and an angle of 60 degrees above the horizontal. What is the ball's impact speed
A ball is thrown horizontally from the top of a cliff from a height h = 23.0 m above the level plain below. With what speed (in m/s) was the ball thrown
A hare and a tortoise compete in a race over a straight course 1.05 km long. The tortoise crawls at a speed of 0.290 m/s toward the finish line. For how long in time was the hare stationary
What is a "meaningful life"? Is it a life marked by great achievements, by the accumulation of great wealth, by fame? Or is a meaningful life more complicated than the actions we take, the jobs we do, the opinions of others, and even the money we ear..
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