Chemistry, 09.02.2022 22:10 nickcjacques

Which of the following examples best represents Newton’s 3rd Law? A. A large truck takes longer to slow down than a car. B. Your stomach jumps when you ride a roller coaster. C. Pushing water backward with oars helps paddle a canoe forward.

Answers: 3

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Answer from: yasarhan2

B. Your stomach jumps when you ride a roller coaster.

Explanation:

Newton's 3rd Law states :

For every action, there is an equal and opposite reaction. Remember: According to this law, forces always act in equal by opposite pairs. Action and reaction force pairs don't cancel each other out because they act on different objects.

#1: This does not work because this option applies to Newton's second law of motion.

- Newton's second law states that the net force equals the product of mass and acceleration.

This is because a truck will typically have more mass due to being larger and made with denser materials to increase strength, it has more momentum at the same speed. This increased momentum requires more force to stop it and thus it can take a longer distance if a similar breaking force is applied.

#2: This option works since it applies to Newton's third law of motion.

The gravity provides acceleration. That causes force. The rider feels the force as it moves the cars along the coaster track. Newton's third law of motion says, "For every action there is an equal and opposite reaction." So that applied to the student's roller coaster, between the marble and the track.

#3: This works but is not the best answer applying to Newton's third law of motion.

Paddling causes a backward force to be applied against the water as a result water gives forward reaction, which helps it to move forwards.

The answer could vary between B and C, personally I believe B applies to Newton's third law of motion more as it applies and matched every text word for word in the statement of Newton's 3rd law of motion.

Option B is the answer.

Hope this helps,

- ROR

Answer from: Quest

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

Answer from: Quest

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence, the electronegativity (or the ability to attract electrons) is lessened."