1.

Exdone by the force of gravity during the first 2 s of motion.The system is released from rest. Findthe workkg

Answer»

The acceleration of the system is = net force/total mass = (3*10-2*10)/(3+2) = 10/2 = 5m/s²

now, in 2sec the displacement is s = 1/2*(a)*t² = 1/2*(2)*(4) = 2m

workdone = net force × displacement= 10*2 = 20J

why it is 3g-2g plz answering my questions

because on making the rope straight , you will find that 3g and 2g are acting in opposite direction.

2g<---------------->3g

okay



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