An object with a mass m= 250 g is on a plane inclined at 30 degreesabove the horizontal and is attached by a string to a mass m = 150g. there is no friction and mass m hangs freely and isinitially at rest. when mass m has descended a distance h = 10 cm, its speed will be
(a) 35.0 cm/s
(b) 7.0 cm/s
(c) 140 cm/s
(d) 110cm/s
(e) 70.0 cm/s

a) v = 35 cm/s

Explanation:

Here the work done by gravity on two masses is equal to the change in kinetic energy of the two masses

so here in m = 150 g mass moves down then other mass M = 250 g will move up by same distance on inclined plane

so we have

here we know that

so we will have

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.