Physics problem with masses and pulley and a ramp

In summary, two masses with values of 50g and 5g are connected with a cord and a pulley. The mass of the cord is neglected and there is no friction. The task is to determine the acceleration of the system and the tension in the cord. The tension is equal to the reaction force over the cord due to the weight of the masses. By creating a free body diagram, the components of the weights acting on the cord can be analyzed and used to find the sum of forces.
  • #1
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Homework Statement



2 masses m1=50g and m2=5g are connected as shown (sori walang pci) m1 is free to move along a horizontal frictionless table. Neglecting the mass of the cord connecting the two masses and assuming a frictionless pulley. Determine the accelereation of the system of blocks and tension in the cord

Homework Equations



F=ma
W=mg

The Attempt at a Solution



Force of the tension
Acceleration

I really couldn't get how to get the tension when its coming from a pulley
please help :D
 
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  • #2


The tension is just the reaction over the rope due to the force exerted by the weight of the masses. The tension over the rope is equal to the force exerted by the weights over the cord. You just need to make a diagram of free body, and analyze which components of the weights are acting over the rope in each case, and then make the sum.

You didn't put a picture, so I'll draw one as I think the problem is, I'm not sure, but I think this is it.
attachment.php?attachmentid=43339&stc=1&d=1328021623.png


The cord and the pulley only acts to redirect and transmit the forces.

Can you go on from here?
 

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  • #3


thank you for that :D
 

1. What is the equation for calculating acceleration in a physics problem with masses and a pulley?

The equation for calculating acceleration in this type of problem is a = (m1 - m2)g / (m1 + m2), where m1 is the mass on the ramp, m2 is the hanging mass, and g is the acceleration due to gravity.

2. How do you determine the direction of acceleration in a problem with a pulley?

The direction of acceleration can be determined by looking at the direction in which the hanging mass is moving. If the hanging mass is moving down, then acceleration is in the same direction. If the hanging mass is moving up, then acceleration is in the opposite direction.

3. How does the angle of the ramp affect the acceleration in a physics problem with masses and a ramp?

The angle of the ramp affects the acceleration by changing the component of the gravitational force acting on the mass on the ramp. The steeper the angle, the larger the component of the gravitational force pulling the mass down the ramp, resulting in a larger acceleration.

4. Is friction a factor in these types of physics problems?

Yes, friction is a factor in these types of problems as it can affect the acceleration of the mass on the ramp. If friction is present, it will act in the opposite direction of motion, causing a decrease in acceleration.

5. How can the tension in the string be calculated in a problem with a pulley and masses?

The tension in the string can be calculated by using the equation T = m2a + m2g, where m2 is the hanging mass and a is the acceleration of the mass. This equation takes into account both the weight of the hanging mass and the additional force due to acceleration.

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