4. How much kinetic energy does a 1,200-kg car traveling at 40 m/s have?
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4. How much kinetic energy does a 1,200-kg car traveling at 40 m/s have?
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Answer:
Given: m - 1200 kg
v - 40 m/s
Required: KE
Solution:
KE = 1/2 mv^2
= 1/2 (1200kg)(40m/s)^2
= 1/2 (1200kg)(1600m^2/s^2)
= 1/2 (1.92x10^6)
= 9.6x10^5 Joules