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3 years ago

What are the three ways acceleration can occur

Physics

1 answer:

Mariana [72]3 years ago

5 0

Answer:

Change in velocity, change in direction, change in both velocity and direction

Explanation:

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As a roller coaster goes downhill A) kinetic energy is converted into potential energy. B) potential energy is converted into ki

lorasvet [3.4K]

Potential energy is converted to kinetic energy. Firstly, the question says nothing about the use of electricity, an electric current, or any sort of voltage, so any answer about electrical energy is irrelevant. Secondly, the key is to understand what potential and kinetic energy mean. Potential energy is the energy that an object has when it is at rest. Kinetic energy is the energy of motion; it is potential energy that has been converted to energy used to do movements, so when a roller coaster falls, its potential energy at the top is converted to kinetic energy as it rolls down.

5 0

3 years ago

Read 2 more answers

A mass of 7.5kg has a weight of 30n on a certain planet calculate the acceleration due to gravitt on this planet

Over [174]

Answer:

Acceleration due to gravity on a certain planet = 4 m/s²

Explanation:

According to the question,

Weight = 30 N

Mass = 7.5 kg

Let acceleration due to gravity be 'a'

<u>Formula</u>:

Weight = Mass × Acceleration due to gravity

30 = 7.5 × a

a = 30/7.5

a = 4 m/s²

6 0

3 years ago

Why will the circuit stop working if the wites were made out of plastic instead of copper?

anastassius [24]

Answer:

plastic isn't conductive

Explanation:

Correct me if I'm wrong but plastic isn't conductive copper is so if it's not conductive it will probably mess up the circuit or somthing

4 0

3 years ago

Two small objects each with a net charge of +Q exert a force of magnitude F on each other. We replace one of the objects with an

Alona [7]

Answer:

F'= 4F/9

Explanation:

Two small objects each with a net charge of +Q exert a force of magnitude F on each other. If r is the distance between them, then the force is given by :

$F=\dfrac{kQ^2}{r^2}$ ...(1)

Now, if one of the objects with another whose net charge is + 4Q is replaced and also the distance between +Q and +4Q charges is increased 3 times as far apart as they were. New force is given by :

$F'=\dfrac{kQ\times 4Q}{(3r)^2}\\\\F'=\dfrac{4kQ^2}{9r^2}$ .....(2)

Dividing equation (1) and (2), we get :

$\dfrac{F}{F'}=\dfrac{\dfrac{kQ^2}{r^2}}{\dfrac{4kQ^2}{9r^2}}\\\\\dfrac{F}{F'}=\dfrac{kQ^2}{r^2}\times \dfrac{9r^2}{4kQ^2}\\\\\dfrac{F}{F'}=\dfrac{9}{4}\\\\F'=\dfrac{4F}{9}$

Hence, the correct option is (d) i.e. " 4F/9"

7 0

3 years ago

A light beam with wavelength 500 nm is reflected constructively from a thin layer of oil having index of refraction 1.25. The oi

kherson [118]

Answer:

t = 200 nm

Explanation:

It is given that,

Wavelength of a light beam is 500 nm

It is reflected constructively from a thin layer of oil having index of refraction 1.25.

The oil floats on the top of water of index of refraction 1.33.

We need to find the minimum thickness of the layer of oil. `

For constructive interference,

$\dfrac{2nt}{\lambda}=m$

m is 1 for minimum thickness

n is refractive index of oil

t is thickness of layer of oil.

So,

$t=\dfrac{m\lambda}{2n}\\\\t=\dfrac{1\times 500\times 10^{-9}}{2\times 1.25}\\\\t=2\times 10^{-7}\ m\\\\t=200\ nm$

So, the minimum thickness of the layer of oil is 200 nm.

5 0

3 years ago