A race car starting from rest accelerates uniformly at 4.9 m/s^2. What is the car's speed after it has traveled 200 meters?

Answers

Answer 1

Answer: The equation v²=u²+2as will help with solving this equation
v is what we are trying to find
u=0
a=4.9
s=200
v²=0²+2*4.9*200
v=√(2*4.9*200)
v=√1960
v=44.3 m/s (3 sf)

Answer 2

Answer:

Hello!

A race car starting from rest accelerates uniformly at a rate of 3.90 m/s² what is the cars speed after it has traveled 200 m.

We have the following data:

Vf (final velocity) = ? (in m/s)

Vi (initial velocity) = 0 m/s (accelerated from rest)

d (displacement) = 200 m

a (acceleration) = 4.90 m/s²

Since we do not need to know the time elapsed during the movement, we apply the data of the question to the Equation of Torricelli, let us see:

$V_f^2 = V_i^2 + 2*a*d$

$V_f^2 = 0^2 + 2*4.90*200$

$V_f^2 = 0 + 1960$

$V_f^2 = 1960$

$V_f = √(1960)$

$V_f = 44.27188724...$

$\boxed{\boxed{V_f \approx 44.27\:m/s}}\:\:\:\:\:\:\bf\blue{\checkmark}\bf\green{\checkmark}\bf\red{\checkmark}$

________________________________

$\bf\red{I\:Hope\:this\:helps,\:greetings ...\:Dexteright02!}$

Related Questions

What is one key physical difference between transition metals and poor metals?
Why is it important to define a frame of reference?a. An observer cannot be moving.b. Motion must be defined relative to something.c. It's impossible to measure motion.d. A stationary observer is always moving.
If the specific heat of water is 1.0 calorie/gram°C, how many calories are required to raise 500 grams of water 10.0°C? 510 cal 5,000 cal 50 cal 501 cal
What energy transfers happen when you cook sausages on a camp fire burning wood?
What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has a mass of 0.15kg

Which change increases the electric force between objects? -Two neutral objects are moved closer together.
-Electrons are added to two negatively charged objects.
-Two oppositely charged objects are moved farther apart.
-The charge on two positively charged objects is reduced.

Answers

Well, the force is proportional to the product of the charges
on the two objects. So if the objects are already negatively
charged distance between them is unchanged, then adding
electrons to either or both objects would increase the forces
between them.

The change that will increase the electric force between objects is "electrons are added to two negatively charged objects".

Electric force between objects

The electric force between objects is determined by applying Coulomb's law as shown below;

F = kq₁q₂/r²

where;

q is the magnitude of the charges
r is the distance between the charges
k is Coulomb's constant

Increase in the magnitude of the charges will increase the electric force between the objects.

Thus, the change that will increase the electric force between objects is "electrons are added to two negatively charged objects".

Learn more about electric force here: brainly.com/question/20880591

Suppose that a sled is accelerating at a rate of 2 m/s2. If the net force is tripled and the mass is halved, then what is the new acceleration of the sled?(show how you solved it)

Answers

Start with Newton's 2nd law of motion:

   Force = (mass) x (acceleration) .

Since we're going to be talking about acceleration,
lets divide each side by (mass):

   Acceleration = (force) / (mass) .

OK. We start out with a certain acceleration 'A₀'. It's the result of
a certain force 'F₀' and a certain mass 'M₀'. (I used the little subscripts " ₀ "
to show that these are the originals, before any changes.)

   Original acceleration = (Original force) / (original mass)

A₀    = F₀ / M₀ .

Now you want to triple the force and cut the mass in half:

   New acceleration A₁ = (3 F₀) / (1/2 M₀) .

Divide each side by 3:    A₁ / 3 = F₀ / (1/2 M₀) .

Multiply each side by 1/2 :   (1/2 A₁) / 3 = F₀/M₀

   A₁ / 6 = F₀/M₀

Take a look at the right side of that equation . . . F₀/M₀ .
That's just the original acceleration A₀ .
So now, after the change, we have A₁ / 6 = A₀ .

You asked "What is the new acceleration ?"
OK. Multiply each side by 6 : A₁ = 6 A₀ .

Whatever the original acceleration was, the
new acceleration is 6 times as much.

If it was originally 2 m/s², then after the change, it becomes (6 x 2) = 12 m/s² .

Final answer:

Using Newton's second law of motion, if the net force on a sled is tripled and the mass halved, the new acceleration would be 12 m/s².

Explanation:

The subject of this question is derived from the principle of Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This can be represented as: F=ma (Force = mass * acceleration).

Given that the original acceleration 'a' is 2 m/s², the force 'F' acting on the sled can be calculated as F=ma. But since the net force is being tripled and the mass halved, the new force would be 3F, and the new mass would be m/2.

Now we need to determine the new acceleration, which can be calculated as a = F/m. Plugging in our new values, we get a = (3F)/(m/2). This equates to a = 6F/m. Since the original force is calculated as F=ma, we can substitute this in the above equation. Hence the new acceleration is 6*2 m/s² = 12 m/s².

Learn more about Newton's second law of motion here:

brainly.com/question/13447525

#SPJ11

Give me 1 example of complete inelastic collision

Answers

i hope it helped thanks

Does anyone understand the Circuit Analysis paper. I'm completely lost. If anyone can help, PLEASE DO!!!

Answers

It's possible that I might have a good chance of understanding it,
and possibly even explaining it, if I could SEE it !

What is air pressure?

Answers

Air pressure is the amount of molecules in the air. For example, the higher you go in Earth's atmosphere the less pressure so less molecules.

Air pressure also varies over time, and these temporal differences are usually caused by the temperature of the air. Cool air is denser (heavier) than warm air. Warm air is less dense (lighter) than cool air and will therefore rise above it. Areas of high pressure can be caused when cool air is sinking and pressing on the ground. At this time, the weather is usually dry and clear. In contrast, when warm air rises, it causes a region of low pressure. With low pressure, the weather is often wet and cloudy.
Air pressure varies over time and from place to place. If we travel up a mountain or go up in a hot air balloon, for example, the air pressure gets less the higher we go. We can explain this difference by comparing air pressure to a pile of blankets on your bed.

Sal connected four light bulbs in a parallel circuit. If Sal adds another light bulb, what is true about the current in each bulb?A) The current decreased when a fourth bulb was added.

B) The current in the four bulbs is much less than the current in three bulbs.

C) The current in each bulb remained the same even though another bulb was added.

D) The current in the fourth bulb is less than the current int he other three bulbs.