Question

Calculate the kinetic energy of a car of mass 500kg moving with a velocity of 36m/s

Answer 1

Question :

Calculate the kinetic energy of a car of mass 500kg moving with a velocity of 36m/s.

Theory :

Kinetic energy: It is the energy possessed by a body by virtue its motion.

${\purple{\boxed{\large{\bold{Kinetic\:Energy=\frac{1}{2} mv{}^{2}}}}}}$

Solution :

Given : Mass of car = 500 kg

velocity of car = 36m/s

$kinetic \: energy \: = \frac{1}{2} mv {}^{2}$

$\implies \: k.e = \frac{1}{2} \times 500 \times 36$

$\implies \: k.e = 500 \times 18$

$\implies \: kinetic \: energy = 9000 \: jolues$

${\purple{\boxed{\large{\bold{Kinetic\:energy=9000\:Jolues}}}}}$

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Additional information:

kinetic energy of a moving body is equal to the amount of work done that must be done to bring a body from rest into the state of motion.

• If kinetic energy is increases (Kf> Ki) then work done is positive
• If kinetic energy is increases (Kf< Ki) then work done is negative
• If kinetic energy remains unchanged then work done is zero.