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3 years ago

Give an example of something you could do to reduce friction.

Physics

2 answers:

Archy [21]3 years ago

5 0

Put oil on a table, that would reduce friction

stich3 [128]3 years ago

4 0

Answer:

There are a number of ways to reduce friction:

Rough surfaces produce more friction and smooth surfaces reduce friction. Lubrication is another way to make a surface smoother. ... Reduce the forces acting on the surfaces. Reduce the contact between the surfaces.

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A uniform solid sphere of radius r = 0.510 m and mass m = 15.5 kg turns counterclockwise about a vertical axis through its cente

klasskru [66]

Answer:

5.160384 kg*m²/s

Explanation:

The vector angular momentum P can be found using the following expression:

P = I * w

I refers to the inertia, that for a sphere is found using the expression:

I = $\frac{2}{5}$ * m * r² = $\frac{2}{5}$ * 15.5kg * (0.510m)² = 1.61262 kg*m².

The angular velocity w is given by the problem, and has a value of 3.2 rad/s.

Replacing the data we get:

P = 1.61262 kg*m² * 3.2 rad/s = 5.160384 kg*m²/s

5 0

3 years ago

The most likely models of the planet Mercury indicate that more than half the planet may be composed of________.

Oxana [17]

Answer:

iron

Explanation:

4 0

3 years ago

I believe that our solar system formed by the same process as star formation. A huge cloud of dust and gas collapsed and condens

xz_007 [3.2K]

Nebular hypothesis.

Explanation:

The first version of the nebula hypothesis was proposed by Immanuel Kant and Pierre Laplace.
Today the hypothesis has been revised to fit into more current and update realities about how our solar system emerged.
The hypothesis is the widely accepted explanation to the origin and evolution of the solar system.
It suggests that the star and the planets that makes up the solar system were products of a huge cloud of dust called the nebular.
The nebular is a huge mass of interstellar dusts.
The cloud collapsed and condensed under gravitational pull of the materials.
A center core that resulted in the formation of our star, sun emerged and the rest of the particles formed our planet.

Learn more:

The sun energy brainly.com/question/1140127

#learnwithBrainly

4 0

4 years ago

A jet plane traveling 1890 km/h (525 m/s) pulls out of a dive by moving in an arc of radius 5.20 km. What is the plane's acceler

Tema [17]

Answer:

Acceleration of the plane, a = 5.4 g

Explanation:

It is given that,

Speed of the jet plane, v = 1890 km/h = 525 m/s

Radius of the arc, r = 5.20 km = 5200 m

The plane is moving in the circular path, the centripetal acceleration will act on it. It is given by :

$a=\dfrac{v^2}{r}$

$a=\dfrac{(525\ m/s)^2}{5200\ m}$

$a=53.004\ m/s^2$

We know that, the value of g is, $g=9.8\ m/s^2$

$\dfrac{a}{g}=\dfrac{53.004\ m/s^2}{9.8\ m/s^2}=5.4$

$a=5.4\times g$

So, the acceleration of the plane is 5.4 g. Hence, this is the required solution.

6 0

3 years ago

Read 2 more answers

A 2kg ball is thrown upward with a velocity of 15 m/s what is the kinetic energy of the ball being thrown?

vivado [14]

Kinetic Energy, or K.E is equal to 1/2 times the mass of an object times the velocity squared.

Therefore K.E
$= \frac{1}{2} \times 2 \times {15}^{2}$
which is 225

Energy is expressed in joules (J)
so the K.E of the ball is 225J

Hope this helped

7 0

4 years ago