Question

a car of mass Van 800 kg is moving is 300 m/s and an auto rickshaw of mass 100 kg is moving at 500m/s which of them have higher kinetic energy



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Answer 1

BTS AND EXO LIVE FOREVER AND EVER

Answer 2

Given :

• Mass of car = 800 kg
• Velocity of car = 300 m/s

To find :

• Kinetic energy of car

Here we have :

⇔ Mass of car (m) = 800 kg

⇔ Velocity of car (v) = 300 m/s

We know that :

⇔ Kinetic energy (K.E.) = ½ * m * v²

⇒ K.E. = ½ * 800 * (300)²

⇒ K.E. = 400 * 90,000

⇒ K.E. = 36,000,000 J

⇒ K.E. = 36,000 Kj

So, kinetic energy of car = 36,000 Kj

Now in the case of auto rickshaw :

• Mass of auto rickshaw (m) = 100 kg
• Velocity of auto rickshaw (v) = 500 m/s

We have to find :

• Kinetic energy of auto rickshaw

So we know the formula :

⇔ Kinetic energy (K.E.) = ½ * m * v²

⇒ K.E. = ½ * 100 * (500)²

⇒ K.E. = 50 * 250,000

⇒ K.E. = 12,500,000 J

⇒ K.E. = 12,500 Kj

So, kinetic energy of auto rickshaw = 12,500 Kj

So we can see that kinetic energy of car > Kinetic energy of auto rickshaw.  [36,000 > 12,500]

Therefore,

Car has higher kinetic energy.