1-The tension in a cable is measured to be 13.24 N, but the calculated value is

Question

1-The tension in a cable is measured to be 13.24 N, but the calculated value is 18.58 N. What is the percent difference?

(Percent difference can be a positive or zero value, please refer to the lab handout)

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2- A rod is hinged at 12cm from its left end as shown. Based on the diagram, please calculate the torque (in units of N.m) if the force (represented by the arrow) is 8 N and the angle (a) is 120o.

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3- If torque on object is zero, the object must not rotate.

true or false

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4- How many kg is equavalent to 815 gram?

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5-How many meter is equavalent to 79 cm?

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6- A rod is hinged at 12cm from its left end as shown. Based on the diagram, please calculate the torque (in units of N.m) if the force is 8 N.

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7- If the total torque on an object is zero, the total force on it must also be zero.

true or false

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8- In this lab, we will determine the location of the center of mass of the meter stick by ________.

a- balancing the meter stick on a pivot.

b- calculation based on its dimension.

c- measuring its mass.

d- In this lab, knowing the center of mass of the meter stick is not needed.

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9- Force sensor must be zeroed before each measurement.

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can you please solve all of them

Explanation / Answer

1 % change = (18.58 -13.24 )*100 / 18.58) = 28.74

2. torqe = F*rperpendiculer   = 8 sin ( 60) * 0.12 = 0.83 N.m

3) net torque should   = 0 than it will not rotate so FALSE

4) 815 /1000 = 0.815 kg

5) 79 /100 = 0.79 m

6) torque = F*r = 8*0.12 = 0.96 N.m (figure not given in question)

7) False becsue torque dipends on angle & distance

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