Question

A car accelerates from 0 m/s to 35 m/s in 5 seconds . What is the car’s acceleration?

Answer 1

☢ Given :

• Initial velocity = 0 m/s
• Final velocity = 35 m/s
• Time = 5s

☢ To find :

• Acceleration of car

☢ Explanation :

Acceleration is defined as rate of change of velocity, Formula for calculating acceleration is given by the equation,

a = (v - u)/t

Where,

• a is acceleration
• v is final velocity
• t is time interval

Acceleration is a vector quantity, therefore denoted by the $\vec a$ . SI unit of acceleration is m/s².

Acceleration can be zero, negative as well as postive. Negative acceleration is called as Retardation. And acceleration is zero when a object in at rest, or final velocity or equal to initial velocity.

☢ Solution :

Use 1st equation of Motion

v = u + at

a = (v - u)/t

a = (35 - 0)/5

a = 35/5

a = 7

➾ Acceleration is 7 m/s²