Question

22. Solve the following 1. If the initial velocity (u) of an object is 20 m/s, which is moving with a uniform acceleration(a) of 2m/s2 for 10 sec What will be its final velocity? (Solve using 14 equation of motion) 2. An aeroplane taxes on the runway for 30 s with an acceleration of 3.2 m/sº before taking oft. How much distance would it have covered on the runway (So
lve using quation of motion 3.​

Answer 1

Answer:

1) 40m/s 2)1440m

Explanation:

1)( v-u)/t= a (first law of motion )

(v-20)/10 = 2

v-20 = 20

v=40 m/s

2) s=ut+(at²)/2

s=0+ (3.2×30×30)/2 ( ut=0 because the initial velocity is 0)

s=3.2×900/2

s=3.2 × 450

s=32×45

s=1440 metres