Question

A plane lands on Runway and covers to a standstill in 20 seconds when the braking force produces a retardation of 5 metre per second square find the initial velocity in metre per second and kilometre per hour​

Answer 1

Explanation:

t = 20s

a = -5m/s2

v= 0 m/s (because the plane came to a standstill)

According to the First Equation of Motion , v = u + at

0 = u + (-5)(20)

0 = u -100

100 = u (Adding 100 on both sides)

Therefore u = 100 m/s

Answer 2

Explanation:

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