Question

two blocks of mass5kg and 7 kg are connected by a rope of m 4 kg an upward force f = 200 N is applied on the system .acceleration in the system is

Answer 1

16.67 m/s^2. Add the masses and divide by the force.

Answer 2

f/M where M is total block + rope = 16 kg then a=12.5m/s^2

Answer 3

The acceleration is much smaller since the weights of the different parts will counteract force f.

Answer 4

it is 200/16 = 12.5m/sec2 ,as the two block and rope can be treated as one point mass object so from F=ma we have the answer.

Answer 5

No, it isn't. Read my post just above.

Answer 6

treat the rope mass systems separately.... draw free body diagram .... mass of rope should be considered..... that mass would create weight of mg.... and solve the question!!!!

Answer 7

or else see tata mcgraw hills for iitjee( newtons laws of motion )....

Answer 8

In subject it is not stated if the system is subject gravity, it is making sense to consider system initially without any gravity effect.