What are the basic si units for the speed of light?.

Calculate the average Power in kilowatts required to pull a car up a ramp in the amount of work is 250 KJ over a period of 45 se

kherson [118]

For this case we have that by definition, the average power is given by:

$P = \frac {W} {t}$

Where:

W: It is the work done

t: It's time

According to the data we have to:

$W = 250 \ KJ = 250,000 \ J\\t = 45 \ s$

So:

$P = \frac {250,000} {45}\\P = 5555.55 \ watts = 5.56 \ kw$

Answer:

$5.56 \ kw$

5 0

4 years ago

Determine the MA based on the diagram below.

artcher [175]

There are two things that you should remember while dealing with the "Lever Mechanical Advantage" problems:

1) The Effort Arm;
2) The Resistance Arm.

Some books label the Effort Arm as in-lever arm and the Resistance Arm as out-lever arm. (Physics Jargon that you need to remember in order to solve problems)

The Effort Arm is that "part" of the lever where the force can be applied. The Resistance Arm is where some mass is placed. In the diagram, as you can see, the mass is placed on one arm of the lever. Therefore, it is the Resistance Arm.

Now the formula for the "Mechanical Advantage(MA)" is:
$MA = \frac{L_{e} }{ L_{r} }$

Where $L_{e}$ is the length of the Effort Arm(the subscript "e" stands for Effort), and $L_{r}$ stands for the length of the Resistance Arm(here "r" stands for Resistance).

Plug in the values:

$L_{e}$ = 15m.
$L_{r}$ = 7m.

Therefore, $L_{e}$ / $L_{r}$ = 15/7 = 2.143 = MA

The correct answer is option C(2.14).

-i

3 0

3 years ago

Read 2 more answers

Acceleration directed toward the center of a circular path that produces uniform circular motion is

tester [92]

<span>Th answer is Centripetal</span>

4 0

4 years ago

Read 2 more answers

A sled of mass m is given a kick on a frozen pond. The kick imparts to the sled an initial speed of 2.00 m/s . The coefficient o

kobusy [5.1K]

2.04 meters distance is traveled by the sled before stopping.