Question

If an object moves from 0 m/s to 25 m/s in 8.0 second, what is the their acceleration?

Answer 1

Explanation:

a=(v-u)/t

a=25/8

a=3.125m/s²

Answer 2

Given :

• Initial velocity, u = 0 m/s

• Final velocity, v = 25 m/s

• Time, t = 8 seconds

To find :

• Acceleration, a

According to the question,

By using Newtons first equation of motion,

➞ v = u + at

Where,

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

➞ Substituting the values,

➞ 25 = 0 + a × 8

➞ 25 - 0 = 8a

➞ 25 = 8a

➞ 25 ÷ 8 = a

➞ 3.125 = a

So,the acceleration is 3.125 m/s².

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More formulas :

Newton's first equation of motion :

• v = u + at

Newton's second equation of motion :

• s = ut + ½ at²

Newton's third equation of motion :

• v² = u² + 2as