Physics College

A book is at rest on a table top. The gravitational force acting on it is 100 N. A free-body
diagram for this situation looks like this:

Answers

Answer 1

Answer: 100n

Explanation: 1+1=2

Related Questions

Explain why a car that was driving along a flat surface and is now heading downhill is not in a closed system?

Answers

Since an external force now acts on the car as it moves downhill, it is no longer a closed system.

What is a closed system?

A closed system is one in which there is no exchange of energy between the system and the external environment. There is usually a boundary that separates the system from the external environment.

When the car was driving along the flat surface, it could continue moving endlessly according to the Newton's first law of motion. If the direction is now changed downhill, an external force now acts on the car and that is the force of gravity.

Since an external force now acts on the car as it moves downhill, it is no longer a closed system.

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Which statement about the accuracy and precision of measuring tools is true

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Answer;

1. Accuracy is the closeness with which an instrument approaches the true value of the quantity being measured

2. Precision is a measure of the reproducibility of the measurement

3. Accuracy may be specified in terms of limits of errors.

explain why the ray does not bend when it enters the semi circular glass block

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Answers

The ray does not bend when it enters the semi circular glass block - Light ray incident on semicircular block at 90 degrees, therefore there is no change in the direction of ray at P.

Electromagnetic radiation that falls within the region of the electromagnetic spectrum that the human eye can see is known as light or visible light.

Light is electromagnetic radiation that the human eye can perceive. From radio waves with wavelengths measured in meters to gamma rays with wavelengths shorter than around 1 1011 meters, electromagnetic radiation occurs throughout an incredibly broad range of wavelengths.

Light governs our sleep-wake cycle and is crucial to our health and wellbeing. In actuality, "light" that is visible is a type of radiation, which is just energy that moves in the form of electromagnetic waves. It can alternatively be explained as a flow of "wave-packets," or particles, known as photons.

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