Work and Energy - Mission WE3 Detailed Help

A 5-kg object is moving with a speed of 4 m/s at a height of 2 m. The kinetic energy of the object is approximately ____ J.

An object has a kinetic energy of 32 J. If the object's speed is doubled, then its new kinetic energy will be ____ J.

(Note: the doubled seen in this question is randomly generated; the actual factor by which speed is changed may differ for your question.)

This is a straightforward calculation of kinetic energy from mass and speed. There are two common mistakes which students are prone to make. First, there is the mistake of forgetting to multiply by 0.5 (or dividing by 2). Second, there is the mistake of forgetting to square the speed.