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velikii [3]
3 years ago
12

You are driving on the highway, and you come to a steep downhill section. As you roll down the hill, you take your foot off the

gas pedal. You can ignore friction, but you can't ignore air resistance.
Identify all the forces acting on the car.
Physics
2 answers:
NISA [10]3 years ago
6 0

Answer:

Explanation: Here you know that:

The car is in downhill (so the gravitational force accelerates the car downhill)

we can ignore the friction (so there is no force of friction)

We can not ignore the air resistance (so whe have force of air resistance that is oposite to the direction in which the car moves)

You take the foot of the gas pedal (so there is no intrinsic acceleration of the car)

then the only two forces are the component of the gravitational force in the downhill direction, and the force of the air resistance that is in opposite direction than the gravitational force.

Natasha2012 [34]3 years ago
5 0

Answer:

air

Explanation:

The car is being slowed down by air.

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A car starts from rest and experiences a constant acceleration of 5 m/s2 until it reaches a speed of 650 meters
Zigmanuir [339]

Answer: Time.

Explanation:

Hey there!!!

The reason is,

According to the question we have,

Initial velocity = 0m/s { as it starts from rest}.

Final velocity = 650 m/s

acceleration = 5m/s^2.

Looking on this formula,

a =  \frac{v - u}{t}

Where "v" represents final velocity, "u" represents initial velocity and "a" represents acceleration. We dont have is time "t".

So, it's obvious that tine is an unknown variable.

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

8 0
3 years ago
A train is traveling at a speed of 50km/hr. How.many hours will it take the train to travel 800 km?
bagirrra123 [75]

Answer:

It would take 16 hours

Explanation:

800 divided by 50 = 16

Brainly pls

8 0
3 years ago
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I HAVE NOOOO IDEA!!!!!!!!!! HELP!!!!!!!!!!
lawyer [7]

Answer:

17

Explanation:

4 0
3 years ago
For each of the following, draw the resulting wave when the two pulses occupy the same space. Unless otherwise noted, each wave
frozen [14]

Answer:

A

Explanation:

because it is are of circle

4 0
4 years ago
Suppose you find yourself in your friend's third floor apartment building when you smell smoke coming from outside the door. you
Alborosie

(a) Because the tension in the rope would be larger than the maximum value allowed

When you are sliding down the slope, there are two forces acting on you:

- Your weight, W=mg, acting downward, where

m = 70 kg is your mass

g = 9.8 m/s^2 is the acceleration of gravity

- The tension in the rope, T, acting upward

Therefore, the equation of motion is

T-mg=ma

where a is the acceleration.

If you want to slide at constant speed, then the acceleration must be zero:

a = 0

And so the equation becomes

T-mg=0

This means that the tension in the rope must be:

T=mg=(70 kg)(9.8 m/s^2)=686 N

Which is larger than the maximum tension allowed in the rope (500 N), so the rope will break.

(b) 2.66 m/s^2 downward

Again, we must refer to the equation of the forces:

T-mg=ma

In this case, we want the tension in the rope to be the maximum allowed value,

T = 500 N

the other data are

m = 70 kg is your mass

g = 9.8 m/s^2 is the acceleration of gravity

Substituting into the equation, we can find the corresponding value of acceleration:

a=\frac{T-mg}{m}=\frac{500-(70)(9.8)}{70}=-2.66 m/s^2

where the negative sign means the acceleration is downward.

8 0
4 years ago
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