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3 years ago

WILL MARK BRAINLIEST FOR 2 QUESTIONS!!

Physics

1 answer:

Irina18 [472]3 years ago

7 0

1) Work is the scalar quantity

2) The ideal mechanical advantage of the ramp is 2

Explanation:

In physics, there are two types of quantities:

- Scalar quantity: a scalar quantity is a quantity having only a number and its units. Therefore, it has no direction. Examples of scalar quantities are: distance, speed, energy, mass, temperature...

- Vector quantity: a vector quantity is a quantity having both a magnitude (number+units) and a direction. Examples of vector quantities are: displacement, velocity, force, acceleration...

Let's analyze now the quantities given:

- work : it has only a magnitude, so it is a scalar

- displacement : it has a magnitude and a direction, so it is a vector

- parallel component of force : it has a magnitude and a direction, so it is a vector

- perpendicular component of force: it has a magnitude and a direction, so it is a vector

The ideal mechanical advantage (IMA) of a machine is the mechanical advantage in absence of frictional forces, so when there are no loss of energy.

For a ramp, the IMA is calculated as

$IMA=\frac{L}{h}$

where

L is the length of the ramp

h is its height

For the ramp in this problem, we have

L = 6.00 m

h = 3.00 m

Therefore, its ideal mechanical advatnage is

$IMA=\frac{6}{3}=2$

Learn more about levers and other machines:

brainly.com/question/5352966

#LearnwithBrainly

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1. Consider three objects: Object A is a hoop of mass m and radius r; Object B is a sphere

Zarrin [17]

a) Object C (the disk) has the greatest rotational inertia ( $\frac{3}{2}mr^2$ )

b) Object B (the sphere) has the smallest rotational inertia ( $\frac{4}{5}mr^2$ )

Explanation:

The moments of inertia of the three objects are the following:

1) For a hoop of negligible thickness, it is

$I=MR^2$

where M is its mass and R its radius. For the hoop in this problem,

M = m

R = r

Therefore, its moment of inertia is

$I=(m)(r)^2=mr^2$

2) For a solid sphere, the moment of inertia is

$I=\frac{2}{5}MR^2$

where M is its mass and R its radius. For the sphere in this problem,

M = 2m

R = r

Therefore, its moment of inertia is

$I=\frac{2}{5}(2m)(r)^2=\frac{4}{5}mr^2$

3) For a disk of negligible thickness, the moment of inertia is

$I=\frac{1}{2}MR^2$

where M is its mass and R its radius. For the disk in this problem,

M = 3m

R = r

Therefore, its moment of inertia is

$I=\frac{1}{2}(3m)(r)^2=\frac{3}{2}mr^2$

So now we can answer the two questions:

a) Object C (the disk) has the greatest rotational inertia ( $\frac{3}{2}mr^2$ )

b) Object B (the sphere) has the smallest rotational inertia ( $\frac{4}{5}mr^2$ )

Learn more about inertia:

brainly.com/question/2286502

brainly.com/question/691705

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7 0

4 years ago

PLEASE HELP URGENT 1. You put 1 gram of salt into 1 liter of water and stir. The resulting liquid is an example of

daser333 [38]

C, is correct.

Have a nice day!

6 0

3 years ago

What do echolocation and ultrasounds have in common?

Natali5045456 [20]

They both are mechanical waves.

Explanation:

Echolocation and ultrasounds are both mechanical waves that require a medium to trace through. They both process and transfer information through waves; the difference is that we humans cannot hear ultrasound waves.

8 0

2 years ago

I need help witha worksheet over circuitsin physics could someone help??

garik1379 [7]

Yes u can help I need to see th worksheet to help tho

5 0

3 years ago

URGENT

Advocard [28]

Answer:

$give \\ mass(m) = 1350kg \\ acceleration(a) = 1ms {}^{ - 2} \ \\ sln\ \\ from \: our \: formula \\ \: f = ma \\1350kg \times 1ms {}^{ - 2} \\ f = 1350newton$

the force you applied to your car =1350N

5 0

3 years ago