Question

A car of mass 800 kg is moving at 100 m/s, and an auto rickshaw of mass  100 kg is moving at 50 m/s. Which of them will have higher kinetic energy​

Answer 1

Answer:

Car=4 × 10⁶ J

Rickshaw=1.25×10⁵J

Explanation:

K.E.=

$\frac{1}{2} m {v}^{2}$

KE of car =

$\frac{1}{2} \times 800kg \times {(100m)}^{2}$

=

$400kg \times 10000 {m}^{2}$

=

$4 \times {10}^{6} joules$

KE of rickshaw =

$\frac{1}{2} \times 100kg \times {(50m)}^{2}$

=

$50kg \times 2500 {m}^{2}$

=

$1.25 \times {10}^{5} joules$

Hope my answer helps you if yes then pls mark my answer as brainliest

Answer 2

Solution!!

We can find the kinetic energy of both the vehicles by a formula. We will know which vehicle has more kinetic energy.

Let's find the kinetic energy of the car!!

KE = ½ mv²

Here,

KE → Kinetic energy

m → Mass of the body

v → Speed of the body

m = 800 kg

m = 800 kgv = 100 m/s

KE = ½ × 800 × (100)²

KE = 40,00,000 J = 4 × 10⁶ J

Now let's find the kinetic energy of the auto rickshaw!!

m = 100 kg

m = 100 kgv = 50 m/s

KE = ½ mv²

KE = ½ × 100 × (50)²

KE = 1,25,000 J = 125 × 10³ J

The kinetic energy of the car is more than that of the auto rickshaw.