Agreyhound's velocity changes from rest to 19 m/s in 2 seconds. what is the greyhound's average acceleration?

a)2 m/s2

b)9.5 m/s2

c)19 m/s

d)38 m/s

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt