PHYSICS MIDDLE SCHOOL

If two automobiles have the same velocity, do they have the same acceleration?

Answers

Answer 1
Answer: Not at all.

Examples:

-- They could be on the same road, driving in the same direction.
Still, one may be slowing down while the other one is speeding up.
Then, their accelerations have opposite signs, and may have different
magnitudes, but there may very well be an instant when their velocities
are equal.

-- They may both have the same steady speed, but one is on a straight
road while the other one is on a circular track.  At the instant when both
are facing in the same direction, their velocities are equal, although the
first one has no acceleration at all and the second one has a constant
centripetal acceleration.

Related Questions

Is velocity related to momentum
Which scientist was the first to propose the heliocentric model of the universe? A. Aristotle B. Isaac Newton C. Galileo Galilei D. Nicolaus Copernicus
The East African rift is an example of what
The speed of the cat
For the examples below, explain what a physical change or a chemical change has occurred. Justify your answerA. When you mix baking soda and vinegar, carbon dioxide is released. B. You build a tall sand castle at the beach. After wave washes it over, the sand castle turns into a big pile of sand C. Boiling water turns a raw egg into a hard boiled egg D. Max divided cookie dough into small pieces on a cookie sheet. E. A loaf of freshly baked bread tastes better and looks much different than a lump of bread dough F. A glass of water is left in the Sun. In the time, the water evaporates leaving the glass empty.

The scientists used Nitrogen in her experiments​

Answers

Answer:

Good for her?

Explanation:

Whats the question?

Which process occurs when ocean waves drop seashells on a beach

Answers

Hey there! 

Answer: Depostion

Deposition occurs when ocean waves drop seashells on a beach. This process adds sediments, rocks, and other objects to landforms.

Thank you!

The gravitational attraction between two objects will ________if one object acquires more mass

Answers


The gravitational force between two objects is proportional to the
product of their two masses.  So if either object acquires more mass,
the magnitude of the gravitational attraction between them increases.

Here is a translation of the same statement, into simple English:

If you are on Earth, and your mass increases because you ate a lot,
then your weight will increase.  

A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a total of 2 minutes for the bicycle to return to point A. What is the average speed and average velocity of the bicycle?

Answers

Answer:

2.5 m/s

0 m/s

Explanation:

Average speed is distance over time.

Average velocity is displacement over time.

The bicycle travels 150 meters from A to B, then 150 meters from B to A.  So the distance is 300 meters and the displacement is 0 m.

s = 300 m / 120 s = 2.5 m/s

v = 0 m / 120 s = 0 m/s

Someone in a car going past you at thespeed of 46 m/s drops a small rock from a
height of 2.2 m.
How far from the point of the drop will the
rock hit the ground? The acceleration due to
gravity is 9.8 m/s
2
.

Answers

Answer:

The point of from the drop will the rock hit the ground is 46.47m

Suppose a rocket ship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight. (a) If it starts from rest, how long will it take to acquire a speed one-tenth that of light, which travels at 3.0 × 108 m/s? (b) How far will it travel in so doing?

Answers

(a).
It starts from rest, and its speed increases by 9.8 m/s every second.
One tenth the speed of light is (1/10) (3 x 10⁸ m/s) = 3 x 10⁷ m/s .
To reach that speed takes (3 x 10⁷ m/s) / (9.8 m/s²) = 3,061,224 seconds .
That's about 35 days and 10 hours.

(b).
Distance traveled = (average speed) x (time of travel)
Average speed = (1/2) of (1/10 the speed of light) = 1.5 x 10⁷ m/s .
Time of travel is the answer to part (a) above.
Distance traveled = (1.5 x 10⁷ m/s) x (3,061,224 sec) = 4.59 x 10¹³ meters
That's 45.9 billion kilometers.
That's 28.5 billion miles.
That's about 6.2 times the farthest distance that Pluto ever gets from the Sun.
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in 1994, Vladimir Kurlivich , from Belarus, set the world record as the world's strongest weight lifter. he did this by lifting and holding above his head a barbell whise mass was 253kg. Kurlovich's mass at the time was 133 kg. caculate the normal force exerted on each of his feet during the time he. was having ldi g the barbell
The brightness of a star depends on its (color, composition of atmosphere, or distance from earth), and stars that are closer look (brighter, dimmer, or white).(in parentheses is options)
Which phase change in the Atmosphere forms clouds?.
Two waves with amplitudes of 52 units and 98 units come together. Their amplitude, which is measured at a specific point and time, is 46 units. What wave behavior explains this value? A. destructive interference B. constructive interference C. refraction D. diffraction E. partial transmission