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3 years ago

If a car is traveling eastward, can its acceleration be westward?

2 answers:

5 0

Yes it can. It may be a bit counterintuitive but if the car is slowing down, even if it's traveling east, its acceleration is toward the west because it's decelerating and slowing down.

gizmo_the_mogwai [7]3 years ago

4 0

The motions moving in opposite directions cancel each other when they have the same magnitude or speed in this case. If the car travels towards east, then it can be possible that the acceleration goes west as this case points to deceleration. The acceleration then has a negative sign.

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Alan slides across home plate during a baseball game. If he has a mass of 61

andrew11 [14]

Answer:

D. 371 N

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3 years ago

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A ball is thrown vertically upward with a speed of 1.86

Inessa05 [86]

Answer:

t = 1.09 s.

Explanation:

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This quadratic equation can be solved using determinant.

$\Delta = b^2 - 4ac\\t_{1,2} = \frac{-b \pm \sqrt{\Delta} }{2a}\\t_1 = 1.09~s\\t_2 = -0.71~s$

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3 years ago

Three identical stars of mass M form an equilateral triangle that rotates around the triangle’s center as the stars move in a co

zheka24 [161]

Answer:

$v=\sqrt{\dfrac{2GM}{L}}$

Explanation:

M = Mass of planets

R = Radius of circle

v = Velocity

$\theta$ = Angle

The circle is inside the triangle

$cos\theta=\dfrac{\dfrac{L}{2}}{R}\\\Rightarrow R=\dfrac{L}{2cos\theta}$

The centripetal acceleration

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The speed of the stars is $v=\sqrt{\dfrac{2GM}{L}}$

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4 years ago