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PHYSICS

JAMB 2019 - Question 3

Physics 2019 JAMB Past Questions - Question 3: A 500kg. car which was initially at rest travelled with an acceleration of 5m sec-², it’s kinetic energy after 4 seconds

Choose the correct answers from the options given.

A 500kg. car which was initially at rest travelled with an acceleration of 5m sec-², it’s kinetic energy after 4 seconds

A: 105 j

B: 2.5j

C: 2x10³j

D: 5x10³j

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Correct Answer

Explanation

K.E = 1/2
mv^2; m (at + u)2

since, v = at + u = 1/2
x 500 [(5 x 4)+ 0]^2

= 105J