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joja [24]
3 years ago
8

Please subscribe wonder melodies please on you tube channel​

Physics
2 answers:
Anuta_ua [19.1K]3 years ago
8 0

Sure , I'm subscribing!!!

Reika [66]3 years ago
3 0

Answer:

WTH

i thought this should be full with smarts ones/people

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So i am doing a science fair project and its about earthquakes so im going to need different supports for my buildings. I found
In-s [12.5K]
You could use clay, sticks, rocks, Legos,
8 0
3 years ago
What is the force required to stop a 20 kg man traveling at 12.3 m/s East in 0.9 s? *Round to TWO decimal points and include you
abruzzese [7]

F = ma

We have mass = 20kg

And we need to solve for acceleration

So acceleration is change in velocity over time, in this case we have one velocity and we can assume the man started from rest so

12.3 / 0.9 = a

a = 13.6667

Now we can plug that into F = ma

F = (20)(13.6667)

F = 273.334

Rounding

F = 273.33

Now he is traveling east so we need a force towards the rest, or in the opposite direction to stop his motion.

If we assume east is the positive direction then we need a force of

-273.33 N to stop the man or 273.33 towards the west.

4 0
4 years ago
Two identical soccer balls are rolled toward each other. What will be true after they collide headon? (2 points)
elixir [45]

Complete Question:

Two identical soccer balls are rolled toward each other. What will be true after they collide headon?

Group of answer choices.

A. they will both stop rolling immediately after they collide head–on.

B. One ball will stop rolling and the other will roll backward at a slower speed.

C. They will both roll back at the same speed they had before the collision

D.They will both roll to the side at a faster speed after the collision

Answer:

C. They will both roll back at the same speed they had before the collision

Explanation:

Newton's Third Law of Motion which states that, for every action there is an equal but opposite reaction.

This ultimately implies that, in every interaction, there is a pair of forces acting on the two interacting objects.

In this scenario, two identical soccer balls are rolled toward each other. Thus, after they collide headon, they will both roll back at the same speed they had before the collision in accordance with Newton’s Third Law of Motion.

Additionally, The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.

This ultimately implies that, if the two identical soccer balls exert forces only on each other, their total momentum is conserved

5 0
3 years ago
A 2400-kg satellite is in a circular orbitaround a planet. The
Fofino [41]

Answer

given,

mass of satellite = 2400 Kg

speed of the satellite =  6.67 x 10³ m/s

acceleration of satellite = ?

gravitational force of the satellite will be equal to the centripetal force

F = \dfrac{mv^2}{r}

F = \dfrac{2400\times (6.67\times 10^3)^2}{r}

Assuming the radius of circular orbit = 8.92 x 10⁶ m

now,

F = \dfrac{2400\times (6.67\times 10^3)^2}{8.92\times 10^6}

F = 11970.11 N

acceleration,

a = \dfrac{F}{m}

a = \dfrac{11970.11}{2400}

  a = 4.98 m/s²

4 0
3 years ago
A student is pushing a box across the room. To push the box three times farther, the student needs to do how much work?
Travka [436]

Answer:

Removing some of the books reduced the mass of the box, and less force was needed to push it across the floor.

8 0
3 years ago
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