A block slides down a rough ramp (with friction) of height h . Its initial speed is zero. Its final speeds at the bottom of the ramp is v . Choose the system to be the block and the Earth.

While the block is descending, its kinetic energy:

a. Increases.
b. Decreases.
c. Remains constant.

a. Increases

Explanation:

By the definition we know that the acceleration is the rate of change in velocity and here we have acceleration component in the direction of motion of the block.

Mathematically:

when the body is moving down:

where:

final velocity of the block

initial velocity of the block

acceleration due to gravity

time of observation during the instance of motion

As we know that kinetic energy is given as:

where:

mass of the block which remains constant (macroscopically)

velocity of the block (which increases here as the body descends)

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~