Question

A car starts from rest and rolls down a hill with constant accelration if it travels a distance of 800 metre in 10 seconds

Answer 1

We know that,

S = ut + 1/2 at^2

800  = 0 + 1/2 * a * (10)^2

800 = 0 + 1/2 a * 100

800 = 50a

a = 800/50

   = 16 m/s^2.



Hope this helps!

Answer 2

here , 

s = 800 m 

u = 0 m/s 

t = 10 seconds 

s = ut + 1/2 at ² 

  = 0 + 1/2 at²

  = 1/2 x a x 10 x 10 

800 = 100a/2

800 = 50 a 

16  = a 

so , a = 16 m/s²

v = u + at 

v = 0 + 16 x 10 

v = 160 m/s