True or False 1- In a perfectly elastic collision, total energy is not conserved

Question

True or False

1- In a perfectly elastic collision, total energy is not conserved.

2-Two force sensors are connected to each other via a massless string. One force sensor is twice the mass of the other. By pulling the more massive one with force F we expect to measure force -2F on the other

3.Angular momentum is always conserved in an isolated system

4.Percent differences measures the precision of an experiment

5.Standard deviation depend upon the number of trials performed.

6.The coefficient of static frictions is always less than the coefficient of kinetic frictions.

7.In a perfectly inelastic collision, momentum conserved.

8.A percent difference 5% indicates an accurate experiment.

9.A sigma difference of 2.5s indicates the experiment has confirmed the hypothesis.

10. A low percent (or relative) uncertainty indicates high accuracy.

Explanation / Answer

1)F

2) F

3)T

4)F

5)T

6)F

7)T

8) T

9) T (doubt)

10)T

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