Question

A car attains a velocity of 54km/h within 10 seconds from an initial velocity of 18km/h. Find its acceleration and displacement

Answer 1

Answer:

Acceleration = 2 ms^-2 and Displacement = 50 m

Explanation:

u = 18 kmh^-1

  = 5 ms^-1

t = 10 seconds

v = 54 kmh^-1

  = 15 ms^-1

a = (v - u)/t

  = (15 - 5)/5

  = 10/5

  = 2 ms^-2

s = ut + 1/2 at²

  = (5 × 5) + 1/2 × 2 × 5²

  = 25 + 25

  = 50 m