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3 years ago

Please help me with these calculating velocity questions im so stressed out

Physics

1 answer:

Darina [25.2K]3 years ago

3 0

Answer: -10m/s

Explanation:

Velocity is solved using the equation displacement over time. Part C shows a displacement or change in x of 30 and a change in time of 3 secs (7-10) so the equation would be 30m/3s= -10m/s it is negative because look at the slope. Its decreasing right? So that means the objects is slowing down which means it can't have a positive velocity

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Charge is distributed uniformly along a long straight wire. the electric field 2 cm from the wire is 20 n/c. the electric field

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The electric field 4cm from the wire is

$É = 10nc { }^{ - 1}$

Given:

charge is distributed uniformly along a long straight wire.

electric field 2cm from the wire is 20n/c

To find:

electric field 4cm from the wire

what is electric field?

Electric field is the region around charge particle or charged body in which if another charge is placed it experiences electrostatic force.An electric field is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them.

$E ∝ \frac{1}{r}$

$\frac{E}{É} = \frac{r2}{r1}$

$\frac{20}{ É } = \frac{4}{2}$

$É = \frac{40}{4}$

$É = 10nc {}^{ - 1}$

thus the electric field 4cm from the wire is

$É = 10nc { }^{ - 1}$

learn more about electrostatic force from here: brainly.com/question/28166144

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