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raketka [301]
3 years ago
10

The energy transferred by a force to a moving object?

Physics
2 answers:
mixer [17]3 years ago
8 0

Answer:

mechanical energy

Vikentia [17]3 years ago
3 0

Answer: mechanical energy

Explanation: I hope this helps! Also, please mark as brainliest, thanks!

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A car increases velocity from 25 m/s to 50 m/s in 5 seconds. What is the acceleration of the car?
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the acceleration of the car is 5m/s2

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An important aspect of fission reactions is that they produce _______________ which allow for chain reactions.
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An important aspect of fission reactions is that they produce free neutrons,  which causes chain reactions.

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An object with a mass M = 250 g is at rest on a plane that makes an angle θ = 30 o above the horizontal. The coefficient of kine
liubo4ka [24]

Answer:

v = 79.2 m/s

Solution:

As per the question:

Mass of the object, m = 250 g = 0.250 kg

Angle, \theta = 30^{\circ}

Coefficient of kinetic friction, \mu_{k} = 0.100

Mass attached to the string, m = 0.200 kg

Distance, d = 30 cm = 0.03 m

Now,

The tension in the string is given by:

Mgsin\theta + \mu_{k}Mgcos\theta + Ma = T        (1)

Also

T = m(g + a)

Thus eqn (1) can be written as:

Mgsin\theta + \mu_{k}Mgcos\theta + Ma = m(g - a)

Mgsin\theta + \mu_{k}Mgcos\theta + Ma = mg + ma

mg - Mgsin\theta - \mu_{k}Mgcos\theta = (M - m)a

a = \frac{0.2\times 9.8 - 0.250\times 9.8\times sin30^{\circ} - 0.1\times 0.250\times 9.8\times cos30^{\circ}}{0.250 - 0.200}

a = 10.45\ m/s^{2}

Now, the speed is given by the third eqn of motion with initial velocity being zero:

v^{2} = u^{2} + 2ad

where

u = initial velocity = 0

Thus

v = \sqrt{2ad}

v = \sqrt{2\times 10.45\times 0.03} = 0.792\ m/s

3 0
3 years ago
Can someone please help me it's urgent!
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Answer:

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