Question

A car is travelling at a velocity of 2.0 m / s. It accelerates at a constant 0.20 m/s² for 2.5 minutes.

What is the final velocity of the car?
A 2.5 m / s B 5.2 m / s C 30 m / s D 32 m / s

Answer 1

Answer : option A

• 2.5 m/s

Step-by-step explanation:

We can use first equation of motion to find out the final velocity of the car.

The equation of first motion is,

`\sf v = u + at`

where, v denotes final velocity, u denotes initial velocity, a denotes acceleration and t denotes time.

According to question given that,

• Initial velocity = 2.0 m/s
• acceleration = 0.20 m/s²
• time = 2.5 sec

Plugging the values into first equation of motion,

`\hookrightarrow \sf v = 2 + 0.20(2.5)`

`\hookrightarrow \sf v = 2 + 0.5`

`\hookrightarrow \sf v = 2.5`

Therefore, the final velocity of the car is 2.5 m/s