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sukhopar [10]
2 years ago
5

A positively charged glass rod attracts object X. The net charge of object X:A.may be zero or negative.B.may be zero or positive

.C.must be negative.D.must be positive.E.must be zero.
Physics
1 answer:
Damm [24]2 years ago
8 0

Answer:A

Explanation:

A positively charged glass rod attracts object x. So, object x must be negatively charged or uncharged.

This occurs because opposite charges attract each other or either object x is uncharged and a negative charge is induced in it as glass rod approach the object x.

So option A is correct

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V=15.3 m/s

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To solve this problem, we have to use the energy conservation theorem:

U_e+K_i+U_{gi}+W_{friction}=K_f+U_{gf}

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the gravitational potential energy at the ground and the kinetic energy at the begining are 0.

8800J+0+0+-100J=\frac{1}{2}*62kg*v^2+1470J\\v=\sqrt{\frac{2(8800J-100J-1470J)}{62kg}}\\v=15.3m/s

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