Question

Please answer this the question is in below file

Answer 1

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We know that:

v² - u² = 2as

initial velocity = u

final velocity = v = 60% less than initial velocity = $\frac{40}{100}$ u= 0.4 u

Now, to find time

v= u + at

0.4 u = u - at

There is a minus symbol, since the acceleration is negative

at = u - 0.4u

t =  $\frac{0.6u}{a}$ (0.6u/a)

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