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Anuta_ua [19.1K]
4 years ago
14

A car traveling at 7.0 m/s accelerates uniformly at 2.5 m/s2 to reach a speed of 12.0 m/s. how long does it take this accelerati

on to occur
Physics
1 answer:
lina2011 [118]4 years ago
4 0
Vf=Vi+at
12=7+2.5t
5=2.5t
t=2s
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a car with an initial velocity of 10ms north was accelerated for 6 second until it ha a final velocity of 25ms north, what is th
koban [17]

Answer:

2 1/2 m/s^2 or 2.5m/s^2

Explanation:

From the question

final velocity v =25m/s

Initial velocity u =10m/s

time = 6 seconds

acceleration a = ?

Using the equation for linear motion

v = u + at

25 = 10 + a x 6

25 = 10 + a6

Subtract 10 from both sides

25-10 = 10 + a6 -10

25 - 10 = 10 -10 + a6

15 = a6

Divide both sides by 6

15/6 = a6/6

5/2 = a

a = 2 1/2 m/s^2 or 2.5m/s^2

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3 years ago
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Earth turns on its axis about once every 24 hours. The Earth's equatorial radius is 6.38 x 106 m. If some catastrophe caused Ear
san4es73 [151]

To solve this problem it is necessary to apply the concepts related to the Period of a body and the relationship between angular velocity and linear velocity.

The angular velocity as a function of the period is described as

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At the same time the relationship between Angular velocity and linear velocity is described by the equation.

v = \omega r

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Our values are given as,

T = 24 hours

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T = 86400s

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Then the linear velocity would be,

v = \omega *r

xv = \omega *r

v= 463.96m/s

The speed would Earth's inhabitants who live at the equator go flying off Earth's surface is  463.96

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3 years ago
The ends of a bar magnet are called _____. poles domains fields currents
Leto [7]

1.        

The ends of a bar magnet are called poles. It has a north pole and a south pole. To magnet two things, the poles must be linked oppositely. North to south and south to north.

3 0
3 years ago
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EastWind [94]

Answer:

1768 N

Explanation:

We can solve the problem by using Newton's second law:

F=ma

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In this problem, we have a car of mass

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How is the average kinetic energy of particles related to temperature of a substance?
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As kinetic energy increases, substance temperature increases
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