PhysicsLAB Worksheet
Freebody Diagrams #4

Refer to the following information for the next two questions.

Given that the hanging block has a mass of 2 kg and the sliding block a mass of 3 kg. The table surface is frictionless and the hanging mass begins 80 cm above the floor.
 

massless, frictionless pulley
If the hanging mass starts from a state of rest, how fast will it be moving just as it impacts with the floor?
 
What will be the tension in the string while the blocks are sliding, before impact? 

Refer to the following information for the next two questions.


massless, frictionless pulley
 
True or False: If the mass lying on the table, M1, is to slide at a constant velocity, the friction between it and the table must equal the weight of the hanging mass, M2g.
 
What would be the coefficient of friction between the sliding mass and the table's surface? 

Refer to the following information for the next five questions.


massless, frictionless pulley
In which direction: clockwise or counterclockwise, will the pulley rotate if the system is released from a state of rest?
 
What is the equation of motion for the 5-kg mass? 

What is the equation of motion for the 3-kg mass? 

What is the acceleration of the system while both masses are moving? 

What is the tension in the cord while the two masses are moving? 

Refer to the following information for the next five questions.

A massless, frictionless pulley is secured at the top of a frictionless, 30º incline. A light cord is then passed over the pulley and connected on each end to a 5-kg mass.
 

massless, frictionless pulley
True or False: The system will remain in equilibrium; that is, the 5-kg resting on the incline will not move up or down.
 
When the system begins to move, what acceleration will each mass experience? 

While the system accelerates, what is the tension in the cord? 

If the system is initially at rest, how much time will it take for the mass hanging off the back of the incline to fall 40 cm? 

After the sliding mass hits the pulley the cord gets tangled and the system stops moving. What is the tension in the cord while the hanging mass remains suspended over the floor? 





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