Question

A 600 kg car travels with a constant speed of 20 m/s. How much gravitational potential energy does the car have is the total energy in the system is 180,000 J?

Answer 1

Answer:

60,000 J

Explanation:

The total Energy in the system = the sum of potential and kinetic energy

Total energy = K. E + P. E

K. E = 0.5mv²

m = mass ; v = velocity, K. E = kinetic energy

V = 20 m/s ; mass = 600kg

Total energy = 180000 J

Hence,

K. E = 0.5 * 600 * 20^2

K.E = 300 * 400

K. E = 120,000

P. E = TOTAL ENERGY - K.E

P.E = I80,000 - 120,000

P.E = 60,000 J