Question

A car is travelling at 20 km/h, it speeds upto 60 km/h in 6 seconds. What is its acceleration?

Answer 1

u = 20 kmph = 20 × 5/18 m/s

v = 60 kmph = 60 × 5/18 m/s

Acceleration = (v - u) / t

= [(60 - 20) × 5/18] / 6

= 1.85 m/s^2

Acceleration of car is 1.85 m/s^2

Answer 2

Answer:

1.85 m/s²

Explanation:

Given:

• Initial velocity of the car = u = 20 km/h
• Final velocity of the car = v = 60 km/h
• Time taken = t = 6 seconds

To find:

• Acceleration of the car

Initial velocity = $20 \times \frac{5}{18} = \dfrac{50}{9} \ m/s$

Final velocity =$60 \times \frac{5}{18} = \dfrac{150}{9} \ m/s$

Acceleration = $\dfrac{V-u}{t}$

Acceleration =$\dfrac{\dfrac{150}{9}-\dfrac{50}{9} }{6}$

Acceleration =$\dfrac{\dfrac{100}{9} }{6}$

Acceleration = $\frac{100}{9}\times \frac{1}{6}$

Acceleration = $\frac{100}{54}$

Acceleration = 1.85 m/s²

The acceleration of the car is equal to 1.85 m/s²