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3 years ago

What is the displacement of a NASCAR stock car after he completes the Indianapolis 500?

1 answer:

3 0

I'm such a devoted NASCAR fan that I don't even know if the starting line and finish line at Indy are the same line ... or maybe they're in different places, like the 100-meter sprint in track.

I have no idea, but I'm going to guess that the start and finish at Indy are the SAME line.

If that's true, then the displacement of a car that runs the whole 500 miles is very close to <em>ZERO</em>.

Displacement is the distance and direction between the place where the object starts out and the place where it ends up. The route it follows to get from the start to the finish is completely ignored, and doesn't matter.

(Do they the Indianapolis 500 in "stock" cars ? ?)

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An electron with speed 2.45 x 10^7 m/s is traveling parallel to a uniform electric field of magnitude 1.18 x 10^4N/C . How much

cupoosta [38]

Answer:

time will elapse before it return to its staring point is 23.6 ns

Explanation:

given data

speed u = 2.45 × $10^{7}$ m/s

uniform electric field E = 1.18 × $10^{4}$ N/C

to find out

How much time will elapse before it returns to its starting point

solution

we find acceleration first by electrostatic force that is

F = Eq

here

F = ma by newton law

ma = Eq

here m is mass , a is acceleration and E is uniform electric field and q is charge of electron

put here all value

9.11 × $10^{-31}$ kg ×a = 1.18 × $10^{4}$ × 1.602 × $10^{-19}$

a = 20.75 × $10^{14}$ m/s²

so acceleration is 20.75 × $10^{14}$ m/s²

and

time required by electron before come rest is

use equation of motion

v = u + at

here v is zero and u is speed given and t is time so put all value

2.45 × $10^{7}$ = 0 + 20.75 × $10^{14}$ (t)

t = 11.80 × $10^{-9}$ s

so time will elapse before it return to its staring point is

time = 2t

time = 2 ×11.80 × $10^{-9}$

time is 23.6 × $10^{-9}$ s

time will elapse before it return to its staring point is 23.6 ns

7 0

3 years ago

What is one way to lower gravitational potential energy?

il63 [147K]

Answer:

decrease the height

Explanation:

height is directly proportional to the g.p.e

4 0

2 years ago

How many hours does it take for the sun's light to reach the edge of the solar system?

Georgia [21]

32 hours is what I got

7 0

3 years ago

Read 2 more answers

1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?

bulgar [2K]

Use KE= 1/2mv^2
So...
50,000=(.5)(1,000)v^2
50,000=500 x v^2
Divide 500 on both sides
100 = v^2
Square root both sides to get rid of v^2
Therefore v = 10 m/s

4 0

3 years ago

Read 2 more answers

4. Marcia consumes 8.4 X 10.J (2000 food calories) of energy per day while maintaining a constant weight.

Crank

Answer:

8.40 is your answer.

Explanation:

5 0

2 years ago