Question

Question 22.
Calculate the kinetic energy of a car of mass 500kg moving with a velocity of 18Km/h. Find the new
kinetic energy if two passengers of mass 50 kg each sit in the car?
Answer
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Answer 1

Answer:

hope it helps...

Good luck

Answer 2

Answer:

6250J, 7500J

Explanation:

We know that K.E=$\frac{1}{2} mv^{2}$

mass, m=500kg

v=18km/hr

= (18*5/18)m/s

=5m/s

Therefore, K.E=$\frac{1}{2}*500*5^{2}$

=6250J

The mass of the car with the passengers= mass of car+mass of passengers

=500kg+ (2*50)kg

=600kg

Therefore, K.E=$\frac{1}{2}*600*5^{2}$

= 7500J