a stone of 1kg is thrown with a velocity of 20m/s and comes to rest after travelling a distance of 50 m. calculate the force exerted on the object.

Force = -4N

Explanation:

Given the following data;

Mass = 1kg

Initial Velocity = 20m/s

Distance = 50m

To find the acceleration;

We would use the third equation of motion;

Since, it comes to rest, its final velocity is zero (0).

V² = U² + 2as

Substituting into the equation, we have;

0 = 20² + 2*a*50

-400 = 100a

a = -400/100

a = -4m/s²

Now to find the force exerted

Force = mass* acceleration

Force = 1*(-4)

Force = -4N

12000j is work done

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat