Question

How fast a 100kg car be moving to have kinetic energy of 2.0*10J

Answer 1

Answer:

If you double the mass of an object, you double the kinetic energy. If you double the speed of an object, the kinetic energy increases by four times. The word "kinetic" comes from the Greek word "kinesis" which means motion. Kinetic energy can be passed from one object to another in the form of a collision.

Answer 2

Answer:

Explanation:

m=100kg

k=2.0*10j

k=1/2mv^2

v^2=2k/m

v^2=2*2*10/100

v^2=0.4

v=0.6ms-1

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