I need help on this question. I am not too sure how to approach it. Thank you in advance!

Question

A system is released. The mass of each object is shown. Neglect drag, friction and the mass of the string and pulley.

How many forces are acting on the 7kg mass?
How many forces are acting on the 10kg mass?
Are the forces on the system balanced?

What is the mass of the system?

What is the magnitude of the net force on the system?

What is the magnitude of the acceleration of the system?

What direction will the 7kg mass move after release?

What is the tension in the string?

_____________________

| O O |

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___|___ |

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|__7kg_| ____|____

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|__10kg__|

Answer 1

On the table 1st question how many forces are acting on the 7 kg mass there is two forces acting on this mass the first one is the gravity force which is the weight which is equal (m.g)and the other is the tension in the string which is upwards- For the second question in the table the forces acting on the 10 kg mass will it be W the weight and tension on the strength the first one is down Ward and the other one is up Ward-The system is not balanced because the weight forces is not equal and so we expect a rotation towards the 10 kg mass.

Mass of the system = 7+10=17kg.—————

Net force = w1-w2= (m1 .g) - (m2 . g)

m1 =10kg ,m2=7kg.—————-

Acceleration = net force/system mass—————-

upward

——————

Use the equation of Newtons second low for any of the two masses to find the tension

w1 -t =m1 x a system