Question

Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h​

Answer 1

Answer:

My ans. is 90,000 Bcz I Multiply by 1500×60 so my ans. is 90,000

Answer 2

Question

Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h ?

Answer

Kinetic energy,

${\pmb{5_k}}$ = ${ \sf{ \dfrac{1}{2}m {v}^{2}}}$

Where,

Mass of car,m = 1500 kg

Velocity of car,V 60 km/h = 60 × ${ \sf{ \dfrac{5}{18}m {5}^{1}}}$

${\sf{E_k = \dfrac{1}{2} \times 1500 \times (60 \times \frac{5}{18})^{2} = 20.8 \times {10}^{4} J}}$

Hence,20.8 × 10⁴ J of work is required to stop the car.

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