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)?
Ke = .5mv^2 so the ke is .5(26)(8.4^2)= 917.28
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.
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?
2ยข
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To find the kinetic energy of an object, you can use the formula:
Kinetic Energy = 0.5 * mass * velocity^2
Given that the mass of the dog is 26 kg and its speed is 8.4 m/s, we can substitute these values into the equation to find the answer.
First, calculate the square of the velocity:
velocity^2 = 8.4 * 8.4 = 70.56 m^2/s^2
Next, calculate the kinetic energy:
Kinetic Energy = 0.5 * 26 * 70.56 = 918.72 Joules
Therefore, the kinetic energy of the 26 kg dog running at a speed of 8.4 m/s is approximately 918.72 Joules.