Samples of different materials, A and B, have the same mass, but the sample

Physics

1 answer:

madam [21]2 years ago

4 0

Answer:

<u><em>A.)</em></u> The particles that make up material A have more mass than the

particles that make up material B.

HOPE that helps!!! :)

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We know that there is a relationship between work and mechanical energy change. Whenever work is done upon an object by an exter

solniwko [45]

Answer:

* roller skates and ice skates.

* roller coaster

Explanation:

One of the best examples for this situation is when we are skating, in the initial part we must create work with a force, it compensates to move, after this the external force stops working and we continue movements with kinetic energy, if there are some ramps, we can going up, where the kinetic energy is transformed into potential energy and when going down again it is transformed into kinetic energy. This is true for both roller skates and ice skates.

Another example is the roller coaster, in this case the motor creates work to increase the energy of the car by raising it, when it reaches the top the motor is disconnected, and all the movement is carried out with changes in kinetic and potential energy. In the upper part the energy is almost all potential, it only has the kinetic energy necessary to continue the movement and in the lower part it is all kinetic; At the end of the tour, the brakes are applied that bring about the non-conservative forces that decrease the mechanical energy, transforming it into heat.

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3 years ago

What happens to the speed of an object when you increase or decrease force?

aliina [53]

If you increase speed you have to increase force to keep a balance Newton's second law.

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3 years ago

A geologist finds that a Moon rock whose mass is 8.94 kg has an apparent mass of 6.18 kg when submerged in water. What is the de

Grace [21]

Density of rock = 3.23 Kg/m^3

Given:

mass of Moon rock = 8.94 kg