Question

an aircraft has take off velocity of 180km/h. what length of runway is needed? the accelaration of aircraft along the runway is 2.5m/s^2 a) 100m b)150m c)320m d) 500m

Answer 1

Question

An aircraft has take off velocity of 180 km/h. What length of runway is needed? The acceleration of aircraft along the runway is 2.5 m/s²

a) 100 m

b) 150 m

c) 320 m

d) 500 m

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Answer

Initial Velocity (u) = 0 m/s

Final Velocity (v) = 180 km/h = 50 m/s

Acceleration (a) = 2.5 m/s²

Distance (s) = ?

For the following question, we'll apply 3rd Equation of Motion.

3rd Equation of Motion → v² - u² = 2as

Substitute the values and find the value of 's'

⇒ (50)² - (0)² = 2(2.5)s

⇒ 2500 = 5s

⇒ s = 2500 ÷ 5

⇒ s = 500 m

∴ The length of runway needed is 500 m.

∴ The correct option is d) 500 m.

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Answer 2

QUESTION:-

an aircraft has take off velocity of 180km/h. what length of runway is needed? the accelaration of aircraft along the runway is 2.5m/s^2 a) 100m b)150m c)320m d) 500m

EXPLANATION:-

• Initial velocity(u)=0 m/s
• Final velocity(v)=180 km/hr=50 m/s
• Acceleration(a)=2.5 m/s²
• Distance(s)=?

Let's use 3rd equation of motion:-

v²=u²+2as

Putting values:-

(50)² - (0)² = 2(2.5)s

2500 = 5s

s = 2500 ÷ 5

s = 500

So opt-d is correct answer

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