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Yuliya22 [10]
3 years ago
13

Friends tell you that on a recent trip their average velocity was +20 m/s. Is it possible that at any time during their trip the

ir velocity was -20 m/s? Explain, and give an example to justify your answer. PLEASE HELP
Physics
1 answer:
xz_007 [3.2K]3 years ago
4 0

Answer: Yes. Please find the answer in the explanation.

Explanation:

Yes. Since velocity is a vector quantity, that is, it has both magnitude and direction.

If the displacements covered are not of the same direction, the velocity will not also of the same direction.

Take for instance, if the velocity in a positive is 40 m/s and velocity in the opposite direction is - 20 m/s . Then, the resultant velocity will be 40 - 20 = 20 m/s

Therefore,  it is possible that at any time during their trip their velocity was -20 m/s.

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Electroscope is the instrument that has the ability to detect the presence of an electric charge. Although electroscope has the power to measure the amount of charge, but for a perfect measurement the electrometer is used. Around the year 1600, electroscope was discovered by William Gilbert he British physician. This is a pretty primitive but highly effective instrument in regards to detecting the presence of electric charges. Two basic but effective electroscopes are the gold-leaf electroscope and the pith-ball electroscope.
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4 years ago
Hey i need some help, what are some facts about smoking prices (its for a project)
VashaNatasha [74]

Answer:

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8 0
3 years ago
an ant weighing 200 N and wearing platform heels with a total area of 7 square centimeters would exert how much pressure?​
iVinArrow [24]

The pressure exerted is 2.86\cdot 10^5 Pa

Explanation:

The pressure exerted by a force on a surface is given by

p=\frac{F}{A}

where

p is the pressure

F is the magnitude of the force

A is the area of the surface

In this problem, we have:

F = 200 N is the force exerted (the weight of the ant)

A=7 cm^2 = 7\cdot 10^{-4} m^2 is the area

Therefore, the pressure exerted is:

p=\frac{200}{7\cdot 10^{-4}}=2.86\cdot 10^5 Pa

Learn more about pressure:

brainly.com/question/4868239

brainly.com/question/2438000

#LearnwithBrainly

7 0
4 years ago
A vehicle that goes from 5 m/s to 45 m/s in 8 s. What is its acceleration?
WINSTONCH [101]

Answer:

5

Explanation:

a= v ÷ t which when you insert it into the equation it should be a= 40m/s ÷ 8s

7 0
2 years ago
How long will it take a person walking at 2.1 m/s to travel 13 m?
MrRissso [65]

Answer:

I gonna give you the number so but you need to round 6.19047619048

Explanation:

  • This is a speed formula so you would use the formula speed=distance/time
  • You need to rearrange it to time=distance/speed
  • So you need to divide 13m by 2.1 m/s

7 0
3 years ago
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