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GrogVix [38]
3 years ago
5

How do you determine if a charged comb is positively charged or negatively charged. Suppose it is positively charged, it will at

tract negative charge on the electroscope and the positive charges on the leaves will repel. If it is negatively charged, it will attract positive charge leaving the negative leaves to repel
Physics
1 answer:
ss7ja [257]3 years ago
5 0
Generally, whenever an object is charged via friction, such as in the case of a comb, it gathers a negative charge because the rubbing brings forth electrons. If the charge is induced using another already charged object, then the charge is positive. If it is positively charged, it will attract the negative charge and cause the leaves to repel.
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Answer:

K.E = 120 Joules.

Explanation:

<u>Given the following data;</u>

Mass = 0.15kg

Distance = 1m

Velocity = 40m/s

To find kinetic energy;

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

K.E = \frac{1}{2}MV^{2}

Where;

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  • M represents mass measured in kilograms.
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Substituting into the equation, we have;

K.E = \frac{1}{2}*0.15*40^{2}

K.E = 0.075*1600

<em>K.E = 120 Joules.</em>

<em>Therefore, the kinetic energy of the baseball is 120 Joules. </em>

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Answer:

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Explanation:

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