Lauren pushed a book off the edge of a table. Which energy change occurs as the book falls from the table?

Physics

1 answer:

suter [353]3 years ago

3 0

Answer:

Potential to kinetic

Explanation:

Potential energy is the energy that is stored in an object that is kept in the stationary position. Kinetic energy is the energy that is stored in the moving object.

The book was primarily in the state of rest and had potential energy in it. When Lauren pushed the book, the potential energy changed into kinetic energy because it fell from the state of rest to state of motion.

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An upright object 2.80 cm tall is placed 16.0 cm away from the vertex of a concave mirror with a center of curvature of 24.0 cm.

horrorfan [7]

Answer:

f = 12 cm

Explanation:

Center of Curvature:

The center of that hollow sphere, whose part is the spherical mirror, is known as the ‘Center of Curvature’ of mirror.

The Radius of Curvature:

The radius of that hollow sphere, whose part is the spherical mirror, is known as the ‘Radius of Curvature’ of mirror. It is the distance from pole to the center of curvature.

Focal Length:

The distance between principal focus and pole is called ‘Focal Length’. It is denoted by ‘F’.

The focal length of the spherical (concave) mirror is approximately equal to half of the radius of curvature:

$f = \frac{R}{2}$