A horse is riding 9m/s. In two seconds it slows down to 1m/s, what is the acceleration of the horse.

-4m/s²

Explanation:

Given parameters:

Initial velocity  = 9m/s

Final velocity  = 1m/s

Time taken  = 2s

Unknown:

Acceleration  = ?

Solution:

The acceleration of a body is the change in velocity of a body with time.

    Acceleration  =

Insert the parameters and solve;

    Acceleration  =  = -4m/s²

We can say, the car is decelerating at a rate of 4m/s²

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.