Bicycle has a kinetic energy of 124 J. what kinetic energy would be the bicycle have if it had the same and was moving with twice the speed?
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Bicycle has a kinetic energy of 124 J. what kinetic energy would be the bicycle have if it had the same and was moving with twice the speed?
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Answer:
KE = 496 J
Explanation:
Given:
KE = 1/2 mv^2 = 124 J
Solution
Find the mass first
When velocity is doubled v will then become v=2v, substitute it in the equation
KE = 1/2 m (2v)^2
KE = 1/2 m (4v^2)
Retain the formula for KE which is = 1/2 mv^2,
KE = 4 (1/2 mv^2)
Understanding the equation, it means that the kinetic energy increased by 4 times
To solve the kinetic energy, multiply the given value to 4
KE = 4 (124 J)
KE = 496 J