what is the kinetic energy in joules of a 1000 kg car travelling at 90km/h
Kinetic energy is 1/2mv^2 so it would be 1/2 x 1000kg x 90^2.
sarah
450000 J
To find the kinetic energy of the car, we need to use the formula:
Kinetic Energy (KE) = 1/2 * mass * velocity^2
First, we need to convert the car's velocity from km/h to m/s as the formula requires the velocity to be in meters per second.
1 km = 1000 meters
1 hour = 3600 seconds
So, 90 km/h = 90 * (1000/3600) m/s
90 km/h = 25 m/s (approximate)
Now, we can substitute the values into the formula:
KE = 1/2 * 1000 kg * (25 m/s)^2
KE = 1/2 * 1000 kg * 625 m^2/s^2
KE = 312,500 Joules
Therefore, the kinetic energy of the 1000 kg car traveling at 90 km/h is approximately 312,500 Joules.
To calculate the kinetic energy of an object, you can use the formula:
Kinetic Energy (KE) = (1/2) * mass * velocity^2
Firstly, convert the velocity from km/h to m/s since the formula requires the velocity in meters per second.
Velocity = 90 km/h * (1000 m/1 km) * (1 h/3600 s)
= 90,000 m/3600 s
≈ 25 m/s
Now, substitute the values into the formula:
KE = (1/2) * 1000 kg * (25 m/s)^2
= (1/2) * 1000 kg * 625 m^2/s^2
= 312,500 joules
Therefore, the kinetic energy of the 1000 kg car traveling at 90 km/h is approximately 312,500 joules.