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o-na [289]
3 years ago
8

Newton has Three Laws of Motion. Seat belts are used to help keep the passengers remaining in their seats during an accident. If

the seat belts are not present the passengers would continue to move forward when the car stops. Which of Newtons three laws does this demonstrates?
1st Law
2nd Law
3rd Law


We use simple machines in our daily life. If I use a knife to cut my sandwich for lunch, _____________________.

I've used less force and done less work.
I've used more force and done more work.
I've used less force and done the same amount of work.
Physics
1 answer:
kherson [118]3 years ago
5 0
Newton’s first law of inertia
Less force, same work
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. A rope is being used to pull a mass of 10 kg vertically upward. Determine the tension on the rope, if starting from rest, the
telo118 [61]

\text{Given that,}\\\\\text{Mass, m =10 kg}\\\\\text{Time, t = 8 sec}\\\\\text{Velocity, v = 4~m/s}\\\\\text{When a body is moving upwards,}\\\\\text{Tension,}~ T=mg +ma\\\\~~~~~~~~~~~~~~~=mg+m\left(\dfrac{v-u}t \right)\\\\~~~~~~~~~~~~~~~=10(10)+10\left(\dfrac{4-0}8\right)\\\\~~~~~~~~~~~~~~~=100+10\left(\dfrac 12\right)\\\\~~~~~~~~~~~~~~~=100+5\\\\~~~~~~~~~~~~~~~=105~N

5 0
2 years ago
The reflective quality of a surface is known as its
Brut [27]
<h2>Answer: Albedo </h2>

The <u>albedo</u> is an amount that expresses the percentage of radiation a surface reflects with respect to the incident radiation.

In other words:

This amount allows us to know the level of radiation that <u>reflects</u> a surface compared to the total <u>radiation it receives</u>.

According to this, light surfaces such as snow covered ground or white sand will have a higher albedo than dark surfaces such as carbon covered ground. It is also important to note, the albedo will be higher on glossy surfaces than on matte surfaces.

It should be noted that the albedo of the Earth is on average about 37\%, which means that part of the radiation received by the Sun is absorbed and another part reflected back to space.

4 0
3 years ago
According to Coulomb’s Law, the force between two charged objects is related to _____.
Natasha_Volkova [10]

Answer:

A.) the inverse of the square of the distance separating them

Explanation:

Coulombs law states that "the force of attraction between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them."

Mathematically, F = kq1q2/r²

Where q1 and q2 are the charges

r is the distance between the charges.

According to the law, the force between two charged objects is related to the inverse of the square of the distance separating them.

5 0
3 years ago
The once-ler used what to make thneeds
Bogdan [553]
He used truffula trees to make thneeds
6 0
3 years ago
A study group is meeting to prepare for an upcoming social studies test on the Civil War. Which question would you
Rainbow [258]

Answer:

What were the most important reasons that the Civil War started?

Explanation: i got it correct

4 0
2 years ago
Read 2 more answers
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