Question

When she was in year 8, sally could run 1600 metres in 6 minutes and 40 seconds. three years later when she was in year 11

Answer 1

Answer:

Here, two balls each of mass 0.25 kg are moving towards each other than in a straight line, one at 3ms

−1

and the other at 1ms

−1

collide and the balls stick together after the collision, hence

m

1

u

1

−m

2

u

2

=(m

1

+m

2

)v

(0.25)(3)−(0.25)(1)=(0.25+0.25)v

(0.75)−(0.25)=(0.5)v

v=1ms

−1

please mark me business at least I have answered something