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taurus [48]
3 years ago
14

An 820 N Marine in basic training climbs a 12.0-m vertical rope at a constant speed in 8.00 s. What is her power output

Physics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Answer:

1230 W

Explanation:

P = \frac{W}{t} = \frac{Force * distance}{time} = \frac{820 N * 12.0 m}{8.00 s} = 1230 Watts

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A billiard ball is moving in the x-direction at 30.0 cm/s and strikes another billiard ball moving in the y-direction at 40.0 cm
____ [38]

Answer:

53.13 °

Explanation:

In order to do this, we just need to apply the following:

tanα = Dy/Dx

Where:

Vy: speed of the ball in the y axis.

Vx: speed of the ball in the x axis.

At this point we do not need the speed of the first ball after the collision because in that moment is already heading in the direction that we are looking for. Therefore, we just need to use the innitial data to calculate the direction which the first ball will go.

According to this, then:

tanα = (40/30)

tanα = 1.3333

α = tan⁻¹(1.3333)

<h2>α = 53.13°</h2>

This means that the final direction of the first ball is 53.13° and in the x axis because the starting momentum of this ball in the x axis has not dissapeared.

Hope this helps

6 0
2 years ago
What is the measure of an average kinetic energy??
makvit [3.9K]
Temperature is the energy
7 0
3 years ago
Energy is lost when machines don’t work right
Anna [14]
Energy in a machine can be something technical like a wire or something went wrong with the system
8 0
3 years ago
The gravitational force between two objects is 100 N.
defon
200N is the answer (at least thats what I think)
5 0
3 years ago
By what order of magnitude is something that runs in nanoseconds faster than something that runs in milliseconds?
maksim [4K]

To solve this problem we will define the order of magnitude of both points, then we will obtain the radius and obtain the conclusion of the order of magnitude.

A nanosecond is one billionth of a second while and a millisecond is one millionth of a second

\frac{\text{millisec}}{\text{nanosec}} = \frac{10^{-3}}{10^{-9}} = 10^6

Therefore something that runs in nanoseconds is six times faster than something that runs in milliseconds

5 0
3 years ago
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