3 years ago

Pls help! What is movement of energy from one system to another also known as?

Physics

1 answer:

blondinia [14]3 years ago

3 0

Answer:

Either energy transformation or energy conversion

Depends on which one you were taught.

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As the temperature of an object rises, so does the.....

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A 45.0 - kg girl is standing on a 150. - kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a

Mrac [35]

Answer:

The velocity relative to the surface of the ice is 6.5 m/s.

Explanation:

Given that,

Mass of girl m= 45.0 kg

Mass of plank M= 150 kg

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We need to calculate the velocity relative to the surface of the ice

Using conservation of momentum

$mv_{1}+Mv_{2}=(m+M)v$

Here, $v_{2}=0$ because plank at rest

$v_{1}=\dfrac{m+M}{m}\times v$

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3 years ago

In a shot-put competition, a shot moving at 15m/s has 450J of mechanical kinetic energy. What is the mass of the shot? Please he

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Given:

Velocity (v) = 15 m/s

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Mechanical kinetic energy (K.E) = 1/2mv²

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Batteries are usually identified by their voltage.

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