Quick help need with finding the MAGNITUDE of the TORQUE of this wrench

In summary, the student tried to calculate a force using Frsin θ, but got the wrong answer. They then tried to calculate the magnitude of the force using 101.426982807+251.040591727 = 352.4 N*m, but also got it wrong. They were reminded to check their units and the direction of the force, and eventually arrived at the correct value of 251.04 N*m in a counterclockwise direction.
  • #1
riseofphoenix
295
2
Number3Physics.png


I tried using Frsin θ

(270.756)(46 cm)sin (68) but I got 11547.86

And got it wrong...

And then I tried doing.

101.426982807+251.040591727 = 352.4 N*m but I got it wrong.

^ I don't remember how I did that but it was saved in my notes.

Help?
 
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  • #2
riseofphoenix said:
I tried using Frsin θ

(270.756)(46 cm)sin (68) but I got 11547.86
You have the wrong F. You used the result from part a, which is a torque.
 
  • #3
Doc Al said:
You have the wrong F. You used the result from part a, which is a torque.

(60)(9.81) = 588.6

588.6(46)sin(68) = 25104.0592??
 
  • #4
riseofphoenix said:
(60)(9.81) = 588.6
Right.
588.6(46)sin(68) = 25104.0592??
Check your units. (How did you do part a?)
 
  • #5
Doc Al said:
Right.

Check your units. (How did you do part a?)

I think I changed r to meters

so...

588.6(0.46)sin (68) = 251.04 N*m

And direction would be counterclockwise, right?
 
  • #6
riseofphoenix said:
I think I changed r to meters

so...

588.6(0.46)sin (68) = 251.04 N*m
Right.

And direction would be counterclockwise, right?
No. Which way would the wrench tend to turn? Just look at the diagram and use your common experience.
 
  • #7
Doc Al said:
Right.


No. Which way would the wrench tend to turn? Just look at the diagram and use your common experience.

clockwise


thanks!
 

1. What is torque?

Torque is a measure of the rotational force applied to an object.

2. How is torque calculated?

Torque is calculated by multiplying the force applied to an object by the distance from the axis of rotation to the point where the force is applied.

3. How do you find the magnitude of torque?

The magnitude of torque can be found by using the equation: magnitude of torque = force x distance.

4. How do you measure torque?

Torque can be measured using a torque wrench or a torque sensor, which can measure the amount of force applied to an object and the distance from the axis of rotation.

5. What are the units of torque?

The units of torque are typically expressed in newton-meters (Nm) or foot-pounds (ft-lb).

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