Why do slippery fluids such as oil reduce sliding friction

1 answer:

6 0

fluid friction occurs when an object moves through a liquid or gas. the force needed to overcome fluid friction is usually less then that needed to overcome sliding friction. the fluid keeps the surface from making direct contact and thus reducing friction.

You might be interested in

How much work in N•m is done when a 10.0-N force moves an object 2.5m?

posledela

10*2.5= 25n.m this is how i got my answer.

5 0

3 years ago

What times what equals 400

Radda [10]

If you're willing to consider fractions or decimals,
then there are an infinite number of answers.
Like (2.5 x 160), and (15 x 26-2/3).

If you want to stick to only whole numbers,
then these 8 combinations do:

1, 400
2, 200
4, 100
5, 80
8, 50
10, 40
16, 25
20, 20

7 0

4 years ago

How big is the planet earth

AnnZ [28]

After doing some research on Wiki, Google, and Easyscienceforkids, I have come to a conclusion that:

Mass: 5.972 * 10^24 kg

Radius: 3958.8 mi

Distance from the sun: 92.96 million mi

6 0

3 years ago

An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid X and 481 km from the center of asteroid

mariarad [96]

Explanation:

It is given that, An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid X and 481 km from the center of asteroid Y, along the straight line joining the centers of the asteroids. We need to find the ratio of their masses.

As they are in equilibrium, the force of gravity due to each other is same. So,

$\dfrac{Gm_xM}{r^2}=\dfrac{Gm_yM}{r^2}\\\\\dfrac{m_x}{r_x^2}=\dfrac{m_y}{r_y^2}\\\\\dfrac{m_x}{r_x^2}=\dfrac{m_y}{r_y^2}\\\\\dfrac{m_x}{m_y}=(\dfrac{r_x^2}{r_y^2})\\\\\dfrac{m_x}{m_y}=(\dfrac{140^2}{481^2})\\\\\dfrac{m_x}{m_y}=0.0847$