Abumper cart has a mass of 200 kg and has a protective bumper around it that behaves like a spring. the spring constant is 5000 n/m. if the cart is moving at a speed of 8 m/s towards a solid barrier, and upon impact, is momentarily brought to rest. a) how much elastic potential energy will be stored in the spring when it is fully compressed? b) what is the average force exerted by the spring if it is compressed by a distance of 0.2 meters?
Answers: 1
Physics, 22.06.2019 21:10
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2
Answers: 2
Physics, 23.06.2019 05:30
Oxygen gas enters well-insulated diffuser at 25 lbf/in.2, 420r, with a velocity of 860 ft/s through a flow area of 1.6 in.^2. at the exit, the flow area is 12 times the inlet area, and the velocity is 19 ft/s. the potential energy change from inlet to exit is negligible. assuming ideal gas behavior for the oxygen and steady-state operation of the diffuser, determine the following: (a) the exit temperature, in r(b) the exit pressure, in lbf/in.^2 (c) the mass flow rate, in lb/s
Answers: 3
Physics, 23.06.2019 09:50
James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. why did he expect a difference
Answers: 3
Abumper cart has a mass of 200 kg and has a protective bumper around it that behaves like a spring....
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