I just wanna check if i am right.
A car is traveling with a velocity of 42.3 m/s and has a mass of 2183.0 kg. Find the Ek of the car.
i used the ek=1/2mv^2 and plugged everything in to get a total of 1953010.035 J .. is that right?
If I were your teacher, I would expect it in Scientific Notation, to three significant figures.
well my teacher does not require that and when we went over problems similar to this, it was expanded out the way i have it now.
To find the kinetic energy (Ek) of the car, you can use the equation Ek = 1/2 * m * v^2, where m represents the mass of the car in kilograms and v represents the velocity of the car in meters per second.
In this case, the given values are:
m (mass) = 2183.0 kg
v (velocity) = 42.3 m/s
To calculate the kinetic energy, substitute these values into the equation:
Ek = 1/2 * 2183.0 kg * (42.3 m/s)^2
Now, let's calculate step-by-step:
Step 1: Square the velocity:
(42.3 m/s)^2 = 1792.29 m^2/s^2
Step 2: Multiply the squared velocity by the mass:
Ek = 1/2 * 2183.0 kg * 1792.29 m^2/s^2
Step 3: Multiply the mass by the squared velocity:
Ek = 1/2 * 2183.0 kg * 1792.29 m^2/s^2 = 1953001.835 J
So, the correct answer for the kinetic energy of the car is approximately 1953001.835 J. This means you were quite close with your answer of 1953010.035 J.