How is net force determined if two students moving a piano exert force in the same direction

Answers

Answer 1

Answer: The net force is determined is basically who is pushing harder in a specific direction.Like since there bith pushing in the same direction the net force is in the direction that they are pushing.

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Explain whether smoke filling up a room is diffusion or not

Answers

Yes, it is diffusion !

Diffusion is the process in which gas, through random movement of particles, tends to fill up the whole volume of the container in which it is placed. So a similar process would lead the smoke, which is in form of gas (or light particles), to fill in the whole room in which it is contained.

Every atom of the ____ carbon has 6 protons.

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Hi, the answer for this question is element!

Hope this helped!

Plz mark brainliest!

~Nate

An example of intentionally increasing friction?

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When a car gets stuck in a marshy pond, we place a wooden block so that the friction increases and the car is helped out of the marsh. In this situation, we intentionally increased friction. Of course there are many other such examples. Hope that helped.

You can increase friction intentionally by rubbing two objects together.

Does energy have mass and take up space?

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Energy does not have a mass to take up space... because........let's say you shine a light into space the volume of the light beam is zero... And say you shine a torch by a black hole what would happen is gravity would pull the light due to gravity...so NO energy does not have have a mass and take up space....hope it helped

No its not true energy does have mass and take up space , that is matter so the real answer is matter

The spring is compressed a total of 3.0 cm, and used to set a 500 gram cart into motion. Find the speed of the cart at the instant it is released, assuming all the elastic potential energy is converted.

Answers

Answer:

1.15 m/s

Explanation:

Part of the question is missing. Found the missing part on google:

"1. A hanging mass of 1500 grams compresses a spring 2.0 cm. Find the spring constant in N/m."

Solution:

First of all, we need to find the spring constant. We can use Hooke's law:

$F=kx$

where

$F=mg=(1.5 kg)(9.8 m/s^2)=14.7 N$ is the force applied to the spring (the weight of the hanging mass)

x = 2.0 cm = 0.02 m is the compression of the spring

Solving for k, we find the spring constant:

$k=(F)/(x)=(14.7)/(0.02)=735 N/m$

In the second part of the problem, the spring is compressed by

x = 3.0 cm = 0.03 m

So the elastic potential energy of the spring is

$U=(1)/(2)kx^2=(1)/(2)(735)(0.03)^2=0.33 J$

This energy is entirely converted into kinetic energy of the cart, which is:

$U=K=(1)/(2)mv^2$

where

m = 500 g = 0.5 kg is the mass of the cart

v is its speed

Solving for v,

$v=\sqrt{(2K)/(m)}=\sqrt{(2(0.33))/(0.5)}=1.15 m/s$

A foot strikes the floor with a force of 520N at an angle of 20 degrees. what is the friction force exerted by the foot?

Answers

Answer:

Friction force on the ground is 488.6 N

Explanation:

As we know that the force of reaction which is along the horizontal surface in tangential direction is known as Friction force while other perpendicular component of the force is Normal force

Here we know that force is inclined at 20 degree with the horizontal

so we have

$F_f = F cos\theta$