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2 years ago

For calcutating kinetic energy what units do the mass and speed have to be ( k.e=1/2mv^2 )

Physics

1 answer:

kiruha [24]2 years ago

7 0

Answer:

mass is in kg and velocity is in m/s for the answer to be in Joules

Explanation:

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A convex mirror, like the passenger-side rearview mirror on a car, has a focal length of -3.0 m . An object is 6.0 m from the mi

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A) -2.0 m

Look at the ray diagram attached in the picture, where:

p identifies the location of the object

q identifies the location of the image

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p = 6.0 m is the distance of the object from the mirror

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From the ray diagram, we see that q has a distance of 2.0 m from the mirror, and it's on the other side of the mirror compared to the object, so

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This can also be verified by using the mirror equation:

$\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{-3.0 m}-\frac{1}{6.0 m}=-\frac{3}{6.0 cm}\\q = \frac{-6.0 cm}{3}=-2.0 cm$

B) Upright and virtual

As we see from the picture, the image is upright, since it has same orientation as the object.

Also, we notice that the image is on the other side of the mirror, compared to the object. For a mirror,

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Answer:

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The acceleration, however, is always negative no matter where the ball is in its motion. This negative acceleration causes the ball to slow down as it reaches the top, and speed up as it reaches the bottom.

Think about it: If there wasn't a negative acceleration, and it was instead 0, the ball would never come back down and instead keep going in a straight line.

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2 years ago

For calcutating kinetic energy what units do the mass and speed have to be ( k.e=1/2*m*v^2 )

For calcutating kinetic energy what units do the mass and speed have to be ( k.e=1/2mv^2 )