(a) What is the change in potential energy of a 600 kg coastercar as it moves fr
ID: 1672600 • Letter: #
Question
(a) What is the change in potential energy of a 600 kg coastercar as it moves from C to A? (height for C = 20 m, B = 2 m & A = 14 m) (b) What is the kinetic energy of the coaster car at B if itsspeed at C was zero? (c) In parts a & b, was the kinetic energy of the coastercar at A equal to 35,300 J ? (a) What is the change in potential energy of a 600 kg coastercar as it moves from C to A? (height for C = 20 m, B = 2 m & A = 14 m) (b) What is the kinetic energy of the coaster car at B if itsspeed at C was zero? (c) In parts a & b, was the kinetic energy of the coastercar at A equal to 35,300 J ?Explanation / Answer
(600 kg)(9.81 m/s^2)(20 m)= Gravitational Potential Energy atC (600 kg)(9.81 m/s^2)(14 m)= Gravitational Potential Energy atA
(b) Kinetic energy = (1/2)mv^2 Because Kinetic energy for C=0, the Gravitational Potentialenergy at C is the total energy Gravitational Potential energy at C= Gravitational Potentialenergy at B + Kinetic energy at B
(600 kg)(9.81 m/s^2)(20 m)=(600 kg)(9.81 m/s^2)(2 m)+KE Solve for KE
(c) Kinetic Energy at A= Gravitational Potential energy at C -Gravitational Potential energy at A
I don't have a calculator handy, but this should be fairlystraight forward from here.
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