Connected Particles - [Mechanics 2].

Question 1

What does a pulley system involve?

Answer 1

• 2 connected particles.
• Light, inextensible string.
• Smooth Pulley.

Question 2

If the pulley is smooth, what do we assume?

Answer 2

There is no frictional force.

Question 3

What equation do we use for Newton’s Second Law?

Answer 3

F_R = ma.

Question 4

How do you solve Connected Particle Questions?

Answer 4

• Use F_R = ma to form 2 equations for the 2 different particles.
• Set ‘F_R’ as the weight of the particle - (T) Tension for the lowest particle and T - weight for the other.
• Set ‘ma’ as the mass x ‘a’.

Question 5

How do you find the acceleration of the motion of 2 connected particles?

Answer 5

• Consider the system as a whole.
• Use F_R = ma.

Question 6

How do you find the tension of the motion of 2 connected particles?

Answer 6

• Consider one part of the system.
• Use F_R = ma.

Where F = driving force - resistance force.