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3 years ago

How does the law of inertia relate to passengers on a train that is slowing down suddenly.

2 answers:

7 0

Inertia is the tendency of an object to remain at rest or in motion.

According to Newton's First Law of Motion states that an body at rest will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force.

The train is this case is moving forward it will continue to move forward unless friction or the brakes interfere with its movement. Say for instance the train abruptly accelerated then the passengers may feel it as though their bodies are moving backward. In reality, inertia is making the body want to stay in place as the train moves forward.

Sorry if the explainataion is long. Do you understand or are you confused?

lesya [120]3 years ago

4 0

Hold on I’m getting it to u right now

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A horizontal force, F, acts on a crate weighing 8 N, which moves on a horizontal floor at constant speed. The coefficient of fri

RoseWind [281]

The answer is 24 J

F K =.25*8 N

= 2N

F = f k = 2 N

Since a = 0

W = f * s

2 N * 12 m = 24 J

The coefficient of friction is a ratio used to quantify the friction force among two gadgets when it comes to the everyday pressure this is keeping them collectively. The coefficient of friction is critical attention at some stage in material selection and floor requirement determination.

For instance, ice on steel has a low coefficient of friction – the 2 materials slide past each different without problems – whilst rubber on the pavement has an excessive coefficient of friction – the substances no longer slide past each other without difficulty.

The coefficient of friction is dimensionless and it does not have any unit. it is a scalar, meaning the direction of the force does not have an effect on the physical quantity. The coefficient of friction depends on the gadgets that are causing friction.

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2 years ago

The scale model of an airplane is 1:130, where 1 inch on the model is equal to 130 inches on the actual airplane. Which statemen

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3 years ago

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3 years ago

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A 280-m-wide river flows due east at a uniform speed of 4.7m/s. A boat with a speed of 7.1m/s relative to the water leaves the s

tamaranim1 [39]

Answer:

(a) The speed is 7.96 m/s

(b) The direction is 76 degree from positive X axis in counter clockwise direction.

Explanation:

Width of river = 280 m

speed of river, vR = 4.7 m/s towards east

speed of boat with respect to water, v(B,R) = 7.1 m/s at 26 degree west of north

$vR = 4.7 i \\\\v(B,R) = 7.1 (- sin 26 i + cos 26 j) = - 3.1 i + 6.4 j$

(a) The velocity of boat with respect to ground is

$\overrightarrow{v}_{(B,R)}=\overrightarrow{v}_{(B,G)}-\overrightarrow{v}_{(R,G)}\\\\- 3.1 \widehat{i} +6.4 \widehat{j}=\overrightarrow{v}_{(B,G)} - 4.7 \widehat{i}\\\\\overrightarrow{v}_{(B,G)} = 1.6 \widehat{i} + 6.4 \widehat{j}\\\\{v}_{(B,G)} = \sqrt{1.6^2 + 6.4^2}=6.96 m/s$

(b) The direction is given by

$tan\theta = \frac{6.4}{1.6} =4\\\\\theta = 76^o$

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