1)If torque on object is zero, the object must not rotate. True False 2)i f the
ID: 1289438 • Letter: 1
Question
1)If torque on object is zero, the object must not rotate.
True
False
2)if the total torque on an object is zero, the total force on it must also be zero.
True
False
3) If the total force on an object is zero, the total torque on it must also be zero.
True
False
4)The tension in a cable is measured to be 17.82 N, but the calculated value is 18.69 N. What is the percent difference?
5)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.
6) we will determine the location of the center of mass of the meter stick by ________.
a)balancing the meter stick on a pivot.
calculation based on its dimension.
measuring its mass.
d) knowing the center of mass of the meter stick is not needed.
a)balancing the meter stick on a pivot.
b)calculation based on its dimension.
C)measuring its mass.
d) knowing the center of mass of the meter stick is not needed.
Explanation / Answer
1) False ( change in rotate rate will be zero)
2) False
torque = r x F (may be zero)
3) True
torque = r x F
4) % diff = 18.69 - 17.82 / 17.82 x 100 = 4.88 %
6) a)balancing the meter stick on a pivot.
(meter stick got balance on pivot at its centre of mass location)
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