calculate the kinetic energy of a car of mass 500 kg moving with a velocity o 36 km/h.
find the kinetic if the velocity of the car doubles
Answers
Explanation:
Mass of car = 500 kg
Velocity is 36 km/h
hence ,K.E = 1/2mv^2
1/2 × 500 kg × 36 × 36 = 324000 KJ
Answer:
The kinetic energy of the car = 25,000 J
The kinetic energy of the car if its velocity is doubled = 1,00,000 J
Explanation:
Mass of the car, m = 500 Kg
Velocity of the car, u = 36 Km/h = 10 m/s
If the velocity of the car doubles, v = 2 × 10 m/s
= 20 m/s
The initial kinetic energy of the car, K.E₁ = (mu²) / 2
= (500 × 10²) / 2
= 50000/2
= 25,000 J
The kinetic energy of the car if its velocity is doubled, K.E₂ = (mv²) / 2
= (500 × 20²) / 2
= 200000/2
= 1,00,000 J