Question

A car increases its speed from 80km/h to 100km/h in 5 seconds. Find the acceleration of the car in SI unit.​

Answer 1

Answer:

HELLO EVERYONE

YOUR ANSWER IS GIVEN BELOW :

given :

initial speed, u = 80km/h

= 80×5/18

= 22.2m/s

final speed, v = 100km/h

= 100×5/18

= 27.8m/s

time, t = 5 sec

find : acceleration = ?

acceleration = (v-u) / t

= (27.8-22.2) / 5

= 1.12m/s².

THANK YOU☺.

I HOPE IT'S HELPFUL FOR YOU.

Answer 2

Explanation :

GIVEN:

• Initial velocity (u) = 80 Km/h
• Final velocity (v) = 100 Km/h
• Time taken (t) = 5 sec

TO FIND:

• Acceleration (a)

SOLUTION:

Acceleration is given by,

• Change in velocity/Time taken

Where we have,

⟶ u = 80 Km/h

• 80 × 5/18
• 22.22 m/s

⟶ v = 100 Km/h

• 100 × 5/18
• 27.77 m/s

Substituting we get,

⟶ v - u/t

⟶ 27.77 - 22.22/5

⟶ 5.55/5

⟶ 1.11 m/s²

VERIFICATION:

Using the first equation of motion :

⟶ v = u + at

⟶ 27.77 = 22.22 + 1.11(5)

⟶ 27.77 = 22.22 + 5.55

⟶ 27.77 = 27.77

∴ L.H.S = R.H.S