Question

A train starting from a railway station and moving with uniform acceleration attains a speed 40km h^-1 in 10 minutes. Find its acceleration

Answer 1

Answer:

• Acceleration of Train = 240 km h⁻²

Explanation:

Given:

• Train is starting from rest therefore, initial velocity of train, u = 0
• final velocity attained by train, v = 40 km h⁻¹
• Time taken for change in velocity, t = 10 min

To find:

• Acceleration of train, a =?

Formula required:

• First equation of motion

      v = u + a t

[ Where v is final velocity, u is initial velocity, a is acceleration and t is time taken ]

Solution:

we have,

→ t = 10 min

→ t = 10/60  hrs

→ t = 1/6 hrs

Using first equation of motion

→ v = u + a t

→ 40 = ( 0 ) + a ( 1 / 6 )

→ 40 = a / 6

→ a = 40 × 6

→ a = 240 km h⁻²

Therefore,

• Acceleration of car is equal to 240 km h⁻².

Answer 2

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