If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Understand: calculating energy

You might need: Calculator


The suspension system of a car contains springs that are compressed to absorb energy. One of the car’s springs (with a spring constant of 85, comma, 000, start text, N, slash, m, end text) is compressed 0, point, 019, start text, m, end text as the car moves up and down on a bumpy road.
Calculate the elastic potential energy of the compressed car spring.
Round your answer to the nearest integer.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
start text, J, end text