Question

A car is moving with a velocity 90 kmh-¹ and take 4 second to stop after the break are applied. Find the fore if it mass 500kgs

Answer 1

Explanation:

= 90 km/h 5.10 = 90x5 182 = 25 m/s

S = 1 km

a = -0.5 m/s² = -8 10 = = = 1/2 m/s ²

V = 0

Now, using equation of motion -

v² = u² + 2as V2

(0)² = (23)² + 2(-12) 5 S

0 = 625 S = 625 m S

... the car stops, 1 km = 1000 m So, 1000-625

= 375 m