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Home Minds On Work and Energy Mission WE3 Kinetic and Potential Energy Help Help 5

Mission WE3 Kinetic and Potential Energy

The Question

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.)

Formula Fix

The kinetic energy is the energy possessed by an object due to its motion. The amount of kinetic energy (KE) possessed by an object depends upon its mass (m) and its speed (v). The formula for calculating the kinetic energy is
 
KE = 0.5 • m • v2.

Minds On Time

The formula for kinetic energy is stated in the Formula Frenzy section above. The amount of kinetic energy possessed by an object depends directly upon the square of speed (or velocity). An increase in speed will increase the kinetic energy. In fact, an increase in the speed by a factor of 2 will increase the kinetic energy by a factor of 22 or 4.

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