Saturday

December 20, 2014

December 20, 2014

Posted by **Darcie** on Thursday, February 23, 2012 at 8:48pm.

(a) What is the runner's kinetic energy at this instant?

KEi = J

(b) If he doubles his speed to reach the finish line, by what factor does his kinetic energy change?

KEf

KEi

=

- physics -
**bobpursley**, Thursday, February 23, 2012 at 8:50pmKE= 1/2 m v^2

what happens of you double v?

**Answer this Question**

**Related Questions**

physics - A 65.0-kg runner has a speed of 5.20 m/s at one instant during a long-...

Physics - A 70.0-kg runner has a speed of 5.90 m/s at one instant during a long-...

physics - A 62.0-kg runner has a speed of 4.90 m/s at one instant during a long-...

Physics - At an instant, Runner 'A' runs at 6m/s with an acceleration of 2m/s^2...

Physics - A runner is jogging at a steady 8.4 km/hr. When the runner is 2.6 km ...

Physics - Runner A is running at a constant rate of 2.3 m/s when he passes ...

physics - Runner A is running at a constant rate of 2.3 m/s when he passes ...

physics - A runner is moving at a constant speed of 8.00 m/s around a circular ...

college physics - If a coyote is standing at the top of a 125 m cliff getting ...

physics - Sprinting near the end of a race, a runner with a mass of 70 kg ...