Q. 4: Two cars are moving with velocities of 36 km/h and 54 km/h on a highway. Find the ratio of
kinetic energies if mass of the cars are 400 kg and 600 kg respectively.
Answers
Answered by
4
Answer:
m1 = 400 kg
m2 = 600 kg
v1 = 36 km/hr.
v2 = 54 km/hr.
K.E.1 / k.E.2 = ?
Kinetic energy = 1/2 (mv²)
K.E.1 = 1/2 [m1(v1)²]
= 1/2 [400 (36)²]
= 259200 J
K.E.2 = 1/2 [m2(v2)²]
= 1/2 [600 (54)²]
= 874800 J
K.E.1 / K.E.2 = 259200 / 874800
= 8 / 27 J
Ratio = 8 : 27
Answered by
1
Answer:
1. 6400 and 2. 16200
Explanation:
Because the formula of kinetic energy = 1/2 m v square
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