An aeroplane lands on a runway with a velocity of 50 m - s- It decelerates at 10 m - s 2 to a velocity of 20 m - s- Find the time elapsed-A- 4 sB- 3 sC- 2 sD- 1 s

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Byju's Answer

Standard IX

Physics

Derivation of Velocity-Time Relation by Graphical Method

An aeroplane ...

Question

An aeroplane lands on a runway with a velocity of 50 m/s. It decelerates at 10 m/s²to a velocity of 20 m/s. Find the time elapsed.

4 s

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3 s

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2 s

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1 s

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Solution

The correct option is B
3 s

Use v = u + at

20 = 50 - 10 t

t = 3s

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An aeroplane lands on a runway with a velocity of 50 m/s. It decelerates at 10 m/s2 to a velocity of 20 m/s. Find the time elapsed.

The correct option is B 3 s Use v = u + at 20 = 50 - 10 t t = 3s

An aeroplane lands on a runway with a velocity of 50 m/s. It decelerates at 10 m/s²to a velocity of 20 m/s. Find the time elapsed.

The correct option is B
3 s

Use v = u + at

20 = 50 - 10 t

t = 3s