A car with a mass of 1500kg is moving at a speed of 50 km/h. What is it's Ek?
it is 1/2 mv^2, so ...
watch the units.
To calculate the kinetic energy (Ek) of an object, you need to use the formula:
Ek = 0.5 * m * v^2
where:
Ek is the kinetic energy
m is the mass of the object
v is the velocity of the object
In this case, given that the car has a mass of 1500 kg and is moving at a speed of 50 km/h, we need to convert the speed from km/h to m/s.
To do this conversion, we can use the following formula:
v (m/s) = v (km/h) * 1000 / 3600
Plugging in the values:
v (m/s) = 50 * 1000 / 3600
v (m/s) = 13.89 m/s
Now that we have the velocity in meters per second, we can calculate the kinetic energy.
Ek = 0.5 * m * v^2
Ek = 0.5 * 1500 * (13.89)^2
Ek = 0.5 * 1500 * 193.21
Ek = 144,807.75 Joules
Therefore, the kinetic energy of the car is 144,807.75 Joules.