How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

From definition 1 kWh = 3600000 J

The formula for KE = 1/2 * m * v^2

3600000 = 1/2 * 1000 * v^2

3600000 = 500v^2

v^2 = 7200

v = 84.85 m/s

1 watt = 1 Joule per second

1 kW = 1,000 watts = 1,000 J/s

1 hour = 3600 seconds

==> 1 kWh = 3,600,000 Joules

Kinetic energy: KE = 1/2 m v²

3,600,000 J = (1/2) (1,000 kg) (v²)

v² = (3,600,000 J) / (500 kg) = 7,200 m²/s²

v = √ (7,200 m²/s²) = 84.8 m/s (about 190 mph)