Calculate the force on the table

In summary, the conversation is about solving a question that involves a rotating mass attached to a string and rotating on a table. The first part asks for the calculation of angular velocity, while the second part asks for the force on the table at a certain speed and mass. The answer for part a is w=3.61, but there is no answer yet for part b.
  • #1
bahramm
6
0
Hi guys. I need some help to solve this question.

(a) A body of mass m kg is attached to a point by string of length
1.25 m. If the mass is rotating in a horizontal circle 0.75 m below the
point of attachment, calculate its angular velocity.

(b) If the mass rotates on a table, calculate the force on the table when
the speed of rotation is 25 rpm and the mass is 6 kg.
 
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  • #2


Hi bahramm,

Show us what you've done.
 
  • #3


I got w^=g/h w=3.61 so far correct?
 
  • #4


Yes that's the answer for part a.
 
  • #5


cool. any idea about part b?
 

What is the formula for calculating the force on a table?

The formula for calculating the force on a table is F = m x g, where F is the force, m is the mass of the object exerting the force, and g is the acceleration due to gravity.

How do you determine the mass of an object on a table?

The mass of an object on a table can be determined by using a scale or balance to measure its weight, and then dividing that weight by the acceleration due to gravity (9.8 m/s^2).

What is the significance of calculating the force on a table?

Calculating the force on a table can help determine if the table is strong enough to support the weight of objects placed on it. It can also be used to calculate the weight of an object if its mass is known.

How does the force on a table change if the mass of an object changes?

If the mass of an object on a table increases, the force on the table will also increase. This is because the weight of an object is directly proportional to its mass. As the mass increases, so does the force of gravity pulling down on the object, and therefore, the force on the table.

Can the force on a table be negative?

No, the force on a table cannot be negative. Force is a vector quantity and its direction is always taken into account. If the force is acting downwards, it is considered a positive force. If the force is acting upwards, it is considered a negative force.

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