Posted by **ashley** on Friday, September 3, 2010 at 6:05pm.

What is the kinetic energy of a 26 kg dog that is running at a speed of 8.4 m/s (about 19 mi/h)?

- physics -
**David D.**, Friday, September 3, 2010 at 6:08pm
Ke = .5mv^2 so the ke is .5(26)(8.4^2)= 917.28

- physics -
**drwls**, Friday, September 3, 2010 at 6:09pm
Can you calculate

Kinetic Energy = (1/2) M V^2 ?

The answer will be in Joules if you use the right units for M and V.

- physics -
**ashley**, Friday, September 3, 2010 at 6:10pm
A microwave oven has a power requirement of 1235 W. A frozen dinner requires 6.0 min to heat on full power.

(a) How much electrical energy (in kWh) is used?

1 kWh

(b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?

2¢

- physics -
**drwls**, Friday, September 3, 2010 at 6:11pm
Use "Post a New Question" for this.

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