Question

A jet accelerates from rest along a runway to reach a velocity of 100m/s in 20s. Use the formula a =( v - u) /t where a = acceleration, u = initial velocity and v = final velocity.

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Answer 1

Answer:

5m/s²

Explanation:

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Answer 2

Given :-

A jet accelerates from rest along a runway to reach a velocity of 100m/s in 20s.

To Find :-

The acceleration of the jet.

Analysis :-

Substitute the given values in it's respective formula and find the acceleration accordingly.

Solution :-

We know that,

• v = Final velocity
• u = Initial velocity
• a = Acceleration
• t = Time

By the formula,

$\underline{\boxed{\sf Acceleration=\dfrac{Final \ velocity-Initial \ velocity}{Time} }}$

Given that,

Initial velocity (u) = 0 m/s

Final velocity (v) = 100 m/s

Time taken (t) = 20s

Substituting their values,

a = 100-0/20

a = 100/20

a = 5 m/s²

Therefore, the acceleration of the jet is 5m/s².