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Misha Larkins [42]
3 years ago
12

At a certain time a particle had a speed of 18 m/s in the positive x direction, and 2.4 s later its speed was 30 m/s in the oppo

site direction. What is the average acceleration of the particle during this 2.4 s interval?
Physics
1 answer:
hoa [83]3 years ago
3 0
<h2>Average acceleration of the particle during the 2.4 s interval is -20 m/s²</h2>

Explanation:

We have equation of motion v = u + at

     Initial velocity, u =  18 m/s

     Final velocity, v =  -30 m/s    

     Time, t = 2.4 s

     Substituting

                      v = u + at  

                      -30 = 18 + a x 2.4

                      a = -20 m/s²

     Acceleration is -20 m/s²

Average acceleration of the particle during the 2.4 s interval is -20 m/s²

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Tanya [424]

Answer: Whenever important physicists are discussed, Galileo Galilei, Isaac Newton, and Albert Einstein seem get the most attention. However, as you’ve seen, Galileo formulated or refined many of his discoveries and theories based on the findings of others who came before him, including Aristotle

Explanation:

Whenever important physicists are discussed, Galileo Galilei, Isaac Newton, and Albert Einstein seem get the most attention. However, as you’ve seen, Galileo formulated or refined many of his discoveries and theories based on the findings of others who came before him, including Aristotle

6 0
3 years ago
If a spear is jabbeb exactly at that place where the fish appears in water, the fish is not killed
Korvikt [17]

You have learned your lesson well, Suhay. Your statement is correct.

The light rays from the fish BEND when they flow out of the water into the air. But our primitive brain still believes that the light rays flow STRAIGHT from the fish. The result is that the fish does not APPEAR to be at that place where it really is.

7 0
3 years ago
Which of the following statements best explains why liquid water is NOT found on Jupiter?
agasfer [191]

Answer:

The planet lacks a solid surface and the temperature is too low

Explanation:

Jupiter does not have solid surface as it is made up of swirling gases, mainly hydrogen(90%) and helium(~10%). The swirl comes from massive wind with speed of 335 miles/hour. The temperature in cloud of Jupiter is 145°C which is too low for water to remain in liquid state as the temperature range for liquid water is 0°C to 100°C.

6 0
3 years ago
an object of mass 4 kg is placed on an inclined plane at an angle of 60. if the object slides down the plane with an acceleratio
balandron [24]

The forces on the  y axis are:

N-mgcos(60)=0   , wich becomes

N=mgcos(60)

Rember that the friction force is always contrary to the motion of an object and its formula is  f=μ * N

The forces in the x axis are:

-f + mgsin(60)= m * a

-μ*mgcos(60) + mgsin(60)=m*a  ,

μ = ( m*a - mgf=μ[sin(60) )/ ( mgcos(90) )


6 0
3 years ago
3. Light travels from the Sun to Earth in 8.3 min. Given that the speed of light is 3.00108 m/s, what is the distance in meters
nasty-shy [4]

Answer:

13

Explanation:

13.0120481928 it is the distance

4 0
3 years ago
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