A 5kg mass moving at 15 m/s collides with a 2kg stationary(0 m/s) mass. After the collision, both the 5 kg and 2kg mass move off in the same
direction. If the 2 kg mass is moving at 25 m/s, what is the speed of the 5
kg mass? *

d = 58 t + 14

Explanation:

given data

car is travel 1 hour  = 72 miles

car is travel 3 hour = 188 miles

solution

we consider here y axis as distance and x axis as time in hours

so here coordinate will be (1,72) and (3,188)

so

slope of line is

Slope of line =     ................1

put here value and we get

Slope of line =  

Slope of line = 58

so here equation of line with slope 58

and the point will be (1,72)

so distance

d - 72 = 58 × (t-1)    ...........2

d - 72 = 58 t - 58  

solve it we get

d = 58 t + 14

here t is in hours and   d is miles