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4 years ago

What is the purpose of a reference point?

Physics

2 answers:

pishuonlain [190]4 years ago

6 0

Answer: <u>To establish a point from which to measure a future distance, or if movement has occurred.</u>

Explanation:

A reference point is a point with respect to which one comes to know whether any movement has occurred or not. A still point is required. When the object changes distance from that point, it means that object has moved. The distance can be calculated from one point to another.

Therefore, A reference point is used to establish a point from which future distance or if movement has occurred is detected.

KengaRu [80]4 years ago

6 0

The purpose of the reference point is to to establish a point from which to measure future distance, or if movement has occurred.

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Greeley [361]

Explanation:

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3 years ago

Radiation measured in emissions/sec is called the curie. <br> a. True<br> b. False

iragen [17]

True is the correct anwser

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3 years ago

What is the difference in light that is refracted compared to light that is reflected? Think in terms of speed of light as well

Ber [7]

Answer:

The refracted light wave is bent at an angle while the reflected light wave is bounced back either at 90° or at angle less than 180°.

The refracted light wave changes its speed when it moves from one medium to another based on the density of the medium.

The reflected light does not change its speed once it contacts another medium. It just bounces back with the same speed.

Explanation:

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3 years ago

Which of these would represent the force of gravity

tigry1 [53]

Missing figure: find it in attachment.

Answer:

Force D

Explanation:

In order to answer the question, let's keep in mind that the force of gravity on an object on Earth is the attractive force exerted by the Earth on the object; its direction is always downward (towards the Earth's centre), and its magnitude is given by

F = mg

where m is the mass of the object and g is the acceleration of gravity.

It follows immediately that in the figure, the force of gravity is the only force acting downward: therefore, force D.

The other forces are called:

Force A: thrust (it is the forward force generated by the engines)

Force B: lift (it is the upward produced by the aerodynamics of the wings)

Force C: air resistance (it is the backward force due to the friction between the air and the surface of the plane)

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3 years ago

A truck starts from rest with an acceleration of 0.3 m/ S^2 find its speed in km/h when it has moves through 150 m

goblinko [34]

Answer:

v = 34.128 km/hr

Explanation:

Given that,

The initial speed of a truck, u = 0

Acceleration of the truck, a = 0.3 m/s²

Distance moved, d = 150 m

Let the final speed of the truck is v. Using third equation of motion i.e.

$v^2-u^2=2ad\\\\v=\sqrt{u^2+2ad}$

Put all the values,

$v=\sqrt{0^2+2\times 0.3\times 150}\\\\v=9.48\ m/s$

v = 34.128 km/h

So, the final speed of the truck is equal to 34.128 km/h.

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3 years ago