Question

A car accelate uniformly from 20 km/h to 35 km/h in 5s calculate the accelaration
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Answer 1

Answer:

Acceleration = 0.8333 m/s²

Explanation:

Given:

• Initial velocity = u = 20 km/h
• Final velocity = v = 35 km/h
• Time = t = 5 seconds

To find:

• Acceleration of the car

Acceleration = (final velocity-initial velocity)/time

Initial velocity = 20×5/18 = 100/18 m/s

Final velocity = 35×5/18 = 175/18

Acceleration = (175/18-100/18)/5

Acceleration = (75/18)/5

Acceleration = 75/18×1/5

Acceleration = 0.8333... m/s²

The acceleration of the car is equal to 0.8333... m/s²

Answer 2

Answer:

Accelaration = difference/time taken ,

Accelaration - 35km/h-20km/h/5secs

km/s to m/s -   35km/h = 9.7772m/s and 20km/h = 5.55556m/s

Now ; 9.7772-5.5556/5sec = 8.6111[m/s²]

Therefore the acceleration = 8.611[m/s²].