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3 years ago

What force is needed to accelerate a 1,000-kilogram car from a stop to 5 m/s/s?

1 answer:

3 0

That depends on how soon you want it to reach 5 m/s/s. Without friction, ANY force will accelerate the car, like a mosquito pushing on it, but a Space Shuttle booster will accelerate it at a greater rate.

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A 0.676 m long section of cable carrying current to a car starter motor makes an angle of 57.7º with the Earth’s 5.29 x 10^−5T f

Studentka2010 [4]

Answer:

The current in the wire under the influence of the force is 216.033 A

Solution:

According to the question:

Length of the wire, l = 0.676 m

$\theta = 57.7^{\circ}$

Magnetic field of the Earth, $B_{E} = 5.29\times 10^{- 5} T$

Forces experienced by the wire, $F_{m} = 6.53\times 10^{-3} N$

Also, we know that the force in a magnetic field is given by:

$F_{m} = IB_{E}lsin\theta$

$I = \frac{F_{m}}{B_{E}lsin\theta}$

$I = \frac{6.53\times 10^{-3}}{5.29\times 10^{- 5}\times 0.676sin57.7^{\circ}$

I = 216.033 A

5 0

3 years ago

Any clue on this one

aniked [119]

3rd one I believe so

6 0

4 years ago

A rolling ball will eventually come to a stop. Why does this happen?

Digiron [165]

Answer:

(D) friction from the ground changes the ball's

kinetic energy into heat

Explanation:

When a ball is roll on the ground, the electrons in the atoms on the surface of the ground push against the electrons in the atoms on the surface of your ball that is touching the ground. A rolling ball stops because the surface on which it rolls resists its motion,that is when two surfaces come in contact with each other, the surface of one tends to oppose the motion of the other. A rolling ball stops because of friction.

7 0

3 years ago

You collect some data on horse racing along a straight track. You are able to fit the motion of the horse to a function during t

Digiron [165]

Answer:

The equation is missing in the question. The equation is $10 m + 5(m/s^2)t^2+3(m/s^3)t^3$

a). $v=10 t +9t^2$ , the horse will not turn.

b). a(t) = 10 + 18t

Explanation:

Given :

$x(t)=10 m + 5(m/s^2)t^2+3(m/s^3)t^3$

∴ At t =0, x = 10 m

a). Velocity as a function of time

$v = \frac{dx}{dt}$

= $10 t +9t^2$

Turning velocity must be zero.

v(t) = 0

$10 t +9t^2=0$

$\therefore t = 0 \text{ or}\ t =-\frac{10}{9}$

Taking the positive value of time.

The horse will not turn.

b). Acceleration as a function of time.

$a(t)=\frac{dv}{dt}$

= 10 + 18t

∴ a(t) = 10 + 18t

6 0

4 years ago

Hazardous waste is only produced by industry, such as factories or office parks. True Or False

Anon25 [30]

Answer:

Hazardous waste is only produced by industry, such as factories or office parks.

False

Explanation:

Hazardous waste is the waste containing toxic and explosive material.

Industrial waste contains toxic, explosive and corrosive material. Thus, the waste out of industries are hazardous. But, the waste from other sources are also hazardous which are mines, small business, military, defence services etc.

So, Hazardous waste is only produced by industry, mines, small business, military, defence services.

Thus, it is not produced only by industry. Hence, the given statement is false.

4 0

3 years ago

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