A piece of rubber 10cm long stretches 6mm when a load of 100N is hung from it. What is the strain?
60
6
6 x 10-2
6 x 10-3
0.6
Explanation
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In Physics to help for better understanding, it is important to write out your given first.
For this question, the given are:
Original length l= 10cm
Extension e= 6mm
The extension is meant to be in cm and to convert mm to cm, divide the number by 10. Remember that,
10mm=1cm
6mm= (6×1)÷10
= 0.6cm
Load (force) = 100N
Recall that,
Strain= (extension)÷Original length
Strain=0.6cm÷10cm
Strain=0.06
If you convert to standard form, 0.06= 6×10^-²
There is no unit because strain is a ratio of two lengths and they both have the same unit which cancels out during division.
conversion of millimeter to meter is ×10^-3
so ur answer should be 6×10^-4
then u multiply by 100 giving u 6×10^-2
simple
1st, convert the mm to cm.
10mm=1cm
6mm=xcm cross multiply:
the new extension now is =0.6cm
strain=e/Lo: 0.6/10 =0.06(6*10^-2)
if the value is in newton then the other associated values should be in metres and not cm. hence the answer is 0.6.
the correct answer here should be 0.6
remember we are to change to meter
e= 6mm ( in meters, 0.006)
l= 10cm (in meters,0.01)
applying the formula for strain=e/l
0.006/0.01 = 0.6
no unit (strain doesn't have unit).
Option C, There is incorrect... Option E is Correct... Don't 4get we are working for strain not young m...thanks.
using f = ke, f=100, k=10, e= covert 6mm to metre we have 0.06 therefore substitude into the d equation we have 100=10x0.06, 100=0.6, 100x0.6 we have 60 A is d answ
