A car with a mass of 1,500 kg is driving at 20 m/s. What is the kinetic energy of the car?(1 point)
Responses
150,000 J
150,000 J
300,000 J
300,000 J
30,000 J
30,000 J
15,000 J
The correct answer is 150,000 J.
To calculate the kinetic energy of an object, you can use the formula:
Kinetic Energy = (1/2) * mass * speed^2
Given that the mass of the car is 1,500 kg and the speed is 20 m/s, we can substitute these values into the formula:
Kinetic Energy = (1/2) * 1500 kg * (20 m/s)^2
First, let's square the speed:
Kinetic Energy = (1/2) * 1500 kg * (400 m^2/s^2)
Now, multiply the mass by the squared speed:
Kinetic Energy = 0.5 * 1500 kg * 400 m^2/s^2
This simplifies to:
Kinetic Energy = 300000 J
Therefore, the kinetic energy of the car is 300,000 J.
The formula for kinetic energy is KE = 1/2 * m * v^2, where KE is the kinetic energy, m is the mass of the car, and v is the velocity.
Plugging in the values, we have KE = 1/2 * 1500 kg * (20 m/s)^2.
Simplifying, we have KE = 1/2 * 1500 kg * 400 m^2/s^2.
This gives us KE = 300,000 J.
Therefore, the kinetic energy of the car is 300,000 J.