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Zarrin [17]
4 years ago
15

Energy is the abiltiy to do work which causes changes in

Physics
1 answer:
serg [7]4 years ago
5 0
<span>Energy is the ability to do work, such as the ability to move matter against opposing forces such as gravity and friction. Energy exists in several forms, including kinetic energy, which is the energy of motion, and potential energy, which is the capacity to do work..

hope it helps
</span>
You might be interested in
An object is moving east, and its velocity changes from 66 mvs to 26 mvs in 10 seconds. Which describes the
STALIN [3.7K]

Answer:

negative acceleration of 4m/s²

Explanation:

Given parameters:

Initial velocity  = 66m/s

Final velocity = 26m/s

Time taken = 10s

Unknown:

Description of the acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time.

It is mathematically expressed as;

    acceleration  = \frac{v - u}{t}

v is the final velocity

u is the initial velocity

t is the time taken

  Now insert the parameters and solve;

    Acceleration  = \frac{26 - 66}{10}   = -4m/s²

So, we see a negative acceleration of 4m/s²

6 0
3 years ago
A meteorite has a speed of 90.0 m/s when 850 km above the Earth. It is falling vertically (ignore air resistance) and strikes a
Schach [20]

Before it hits the sand bed, the meteorite is accelerating uniformly with g=9.80\dfrac{\rm m}{\mathrm s^2}, so that its speed v satisfies

v^2-{v_0}^2=-2g\Delta y

where v_0=90.0\dfrac{\rm m}{\rm s} is its initial speed and \Delta y=(0-850)\,\mathrm{km}=-850\,\mathrm{km} is its change in altitude. Notice that we're taking the meteorite's starting position in the atmosphere to be the origin, and the downward direction to be negative. Now,

v^2-\left(-90.0\dfrac{\rm m}{\rm s}\right)^2=-2\left(9.80\dfrac{\rm m}{\mathrm s^2}\right)(-850,000\,\mathrm m)\implies\boxed{v=4080\dfrac{\rm m}{\rm s}}

3 0
3 years ago
Near the end of a marathon race, the first two runners are separated by a distance of 45.0 m. The front runner has a velocity of
vovangra [49]

Answer:

0.7 m/s

Explanation:

velocity of first runner = 3.5 m/s

velocity of second runner = 4.20 m/s

Both the runner are running in the same direction

velocity of second runner with respect to first runner = velocity of second runner - velocity of first runner

velocity of second runner with respect to first runner = 4.20 - 3.5 = 0.7 m/s

5 0
4 years ago
The graph shows a wave that oscillates with a frequency of 60 Hz. Based on the information given in the diagram, what is the spe
Snezhnost [94]

Answer:

900 cm/s or 9 m/s.

Explanation:

Data obtained from the question include the following:

Length (L) = 30 cm

frequency (f) = 60 Hz

Velocity (v) =.?

Next, we shall determine the wavelength (λ).

This is illustrated below:

Since the wave have 4 node, the wavelength of the wave will be:

λ = 2L/4

Length (L) = 30 cm

wavelength (λ) =.?

λ = 2L/4

λ = 2×30/4

λ = 60/4

λ = 15 cm

Therefore, the wavelength (λ) is 15 cm

Now, we can obtain the speed of the wave as follow:

wavelength (λ) = 15 cm

frequency (f) = 60 Hz

Velocity (v) =.?

v = λf

v = 15 × 60

v = 900 cm/s

Thus, converting 900 cm/s to m/s

We have:

100 cm/s = 1 m/s

900 cm/s = 900/100 = 9 m/s

Therefore, the speed of the wave is 900 cm/s or 9 m/s.

5 0
3 years ago
The slope of a distance vs. time graph is a measurement called
pogonyaev

Answer:

B. speed

Explanation:

im not sure hahahaha

8 0
3 years ago
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