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Svetradugi [14.3K]
3 years ago
10

A 5000kg car traveling at 40m/s crashes into a wall and comes to a complete stop in 10s. What was the force on the wall? solve s

tep by step and equation to solve​
Physics
1 answer:
IrinaK [193]3 years ago
4 0

Answer:

20,000 N

Explanation:

First find the acceleration:

a = Δv / Δt

a = (0 − 40 m/s) / 10 s

a = -4 m/s²

Next use Newton's second law to find the force on the car:

F = ma

F = (5000 kg) (-4 m/s²)

F = -20,000 N

According to Newton's third law, the force on the wall is equal and opposite the force on the car.

F = 20,000 N

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SOS Two forces, one 5 N and the other 8 N, act on a single object. Which of the
Daniel [21]

If the two forces act in the same direction, their resultant is 13N .

If they act in opposite directions, their resultant is 3N .

These are the limits. The resultant is always between 3N and 13N.

So (B), (C), and (D) (3N, 10N, and 13N are possible.)

<em>(A)</em> 2N is not possible.

4 0
3 years ago
Define VR? ( plz help me)​
vlabodo [156]

Answer:

the ratio of distance travelled by effort to the distance travelled by load in the machine is called velocity ratio (VR)

8 0
3 years ago
A race card drives one lap around a race track that is 500 meters in length. How is this displacement different from the distanc
gulaghasi [49]

Answer:

Distance is 500 m, displacement is 0

Explanation:

Distance and displacement are defined in two different ways:

- Distance is the total length of the path covered by an object in motion - so it depends on the path taken. In this problem, the distance travelled by the car corresponds to the length of one lap, which is the length of the track, so 500 m

- Displacement is the distance in a straight line between the final point and the initial point of the motion. This means that displacement does not depend on the path taken, but only on the starting and ending point of the motion. In this problem, the car completes one lap, so the final position of the car is equal to its starting position - therefore the displacement is zero, since the distance between these two points is zero.

5 0
3 years ago
If a person walks first 70 m in the direction 37° north of east, and then walks 82 m in the
timurjin [86]

Aster's final position from her initial position is 63 m approximately. She will head north west direction to return to her initial position

<h3>What is Displacement ?</h3>

Displacement is the distance travelled in a specific direction. It is a vector quantity.

Given that a person walks first 70 m in the direction 37° north of east, and then walks 82 m in the direction 20° south of east, and finally walks 28 m in the direction 30° west of north.

a) Let P be the Aster's final position from her initial position?

We can use bearing by using Cosine formula to solve this question.

P² = 70² + 82² - 2 × 70 × 82 cos 73

P² = 4900 + 6724 - 11480 cos 73

P² = 11624 - 3356.43

P² = 8267.57

P = √8267.57

P = 90.9 m

P = 90.9 - 28

P = 62.9 m

We can get the angle by using Sine rule

82/ sin Ф = 90.9 / sin 73

sin Ф = 0.8627

Ф = Sin^{-1} (0.8627)

Ф = 59.6°

Ф = 60°

b)  She will head north west direction to return to her initial position

Learn more about Displacement here: brainly.com/question/2109763

#SPJ1

3 0
1 year ago
Select all that apply.
ElenaW [278]
Growing quickly

concentrated in a few areas

<span>putting pressure on resources and space</span>
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3 years ago
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