A car of mass 1100 Kg drives with a velocity such that it has a kinetic energy of 400 kJ ( see the Figure). Find the velocity. If the car is raised with a carne how high should it be lifted in the standard gravitational field (9.81 m/s2) to have a potential energy that equals the kinetic energy?
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Expert's answer
2012-08-10T09:54:29-0400
(i) KE = m * V^2 / 2 V = sqrt(2 * KE / m) V = sqrt(2 * 400000 / 1100) = 26.968 m/s (ii) PE = m * g * h. If PE = KE, h = KE / (m * g) h = 400000 / (1100 * 9.81) = 37.068 m
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lateifa
22.06.16, 11:28
Question 6: A 100 kg roller coaster is released from position "A" with
an initial speed of 30 m/s. The designer of the roller coaster wants
the cart to come to a complete stop at point "B". How high must point
"B" be above the ground? (use g = 9.8 m/s2)
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Dear lateifa, please use panel for submitting new questions.
Question 6: A 100 kg roller coaster is released from position "A" with an initial speed of 30 m/s. The designer of the roller coaster wants the cart to come to a complete stop at point "B". How high must point "B" be above the ground? (use g = 9.8 m/s2)
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