Question

A horse starts from rest and speeds up with constant acceleration. If it has

gone a distance of 100 m at the point when it reaches a speed of 12 m/s,

what is its acceleration?

A. 8.3 m/s2

B. 1.4 m/s2

c. 2.1 m/s2

D. 0.72 m/s2

Answer 1

OptionD

The acceleration of the horse is 0.72m/s2

Step-by-step explanation:

We can use the formula

`v^2=u^2 +2as`

we are looking for the acceleration, which is a. To find this, we can make a the subject of the formula as shown

`a = (u^2 +v^2)/(2s)`

Where a = acceleration of the horse

s = distance covered by the horse = 100m

v = final velocity of the horse = 12m/s

u = initial velocity of the horse = 0 m/s (this is because it starts from rest)

`a= (0+12^2)/(2 * 100)=0.72m/s^2`

The acceleration of the horse is 0.72m/s2