Question

A body with an initial velocity of 18km.hr accelerates uniformly at the rate of 9cm/s over a distance of 200m , calculate acceleration in m/s and final velocity in m/s

Answer 1

A body with an initial velocity of 18 km h^-1 accelerates uniformly at the rate of 9 cm s^-2 over a distance of 200 m. Calculate its final velocity in ms^-1 .

Answer 2

Answer:

Given :-

initial velocity u = 18kmh-¹

$= \frac{18000m}{60 \times 60} = 5ms { }^{ - 1}$

Acceleration a :-

$0.9ms {}^{ - 2}$

Distances :-

200 m

Equation of motion V² :-

u²+2as

We get,v :-

$\sqrt{5 {}^{2} + 2 \times 0.9 \times 200 \frac{m}{s} } \\ = 7.81 \frac{m}{s}$