Which BEST describes the speed and velocity of the graph?

Physics

2 answers:

Neko [114]3 years ago

6 0

I think the answer is A (sorry if it isn't).

Kazeer [188]3 years ago

6 0

This is tricky, but the correct answer is A.

Choice-D is also true. We can't COMPLETELY determine velocity
from the graph, because an essential part of velocity is the DIRECTION
of motion, and the graph doesn't tell us anything about the direction.

But even though we can't COMPLETELY determine velocity from
the graph, we DO know that velocity is changing, because the speed
is definitely changing, and speed is the other big part of velocity.

The graph shows clearly that speed is changing. That right there
tells us that velocity is also changing, and we can pick choice-A.

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2 years ago

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salantis [7]

Explanation:

First, we will calculate the electric potential energy of two charges at a distance R as follows.

R = 2r

= $2 \times 0.1 m$

= 0.2 m

where, R = separation between center's of both Q's. Hence, the potential energy will be calculated as follows.

U = $\frac{k \times Q \times Q}{R}$

= $\frac{8.98 \times 10^{9} \times (3 \times 10^{-6} C)^{2}}{0.1}$

= 0.081 J

As, both the charges are coming towards each other with the same energy so there will occur equal sharing of electric potential energy between these two charges.

Therefore, when these charges touch each other then they used to posses maximum kinetic energy, that is, $\frac{U}{2}$ .