PHYSICS HIGH SCHOOL

Vector addition is used when motion involves

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Answer 1
Answer:

Answer:

direction and speed

Explanation:

because

Related Questions

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Which of the following voltages would most likely be used as a primary distribution voltage by an electric utility company?a. 120 Vb. 440 Vc. 4,160 Vd. 69,000 V
When Emma pushes a bag with a force of 27 newtons, the coefficient of kinetic friction between the bag and the floor is 0.23. What is the normal force acting on the bag by the floor?. A. 0.085 newtons B. 27 newtons C. 2.7 × 10^2 newtons . D. 1.2 × 10^2 newtons
What do multimillion-dollar sponsorships of famous athletes symbolize? a)globalization b)leadership c)commercializationd)sportsmanship
If the distance around a circular track is 2.0km and if runners run 3 laps, what is the distance travelled?a) 2 km b) 0km c) 3 km d) 6 km

explain why the motion of a body which is moving with constant speed in a circular path is said to be accelerated ?

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In this case when a body moves in circular path acceleration is called Centripetal acceleration... Body in circular path moves with constant speed but its direction changes at every instant of time ...as acceleration is produced when either magnitude or direction of velocity changes...here magnitude remains same but direction changes so body is said to be accelerated....
as its velocity changes and hence is known as accelarated

Which statement best compares potential and kinetic energy?. . A) Objects always have more potential energy than kinetic energy..
B)Only kinetic energy increases when the velocity of an object increases. .
C)Only potential energy decreases when an object’s height increases..
D)Objects always have more kinetic energy than potential energ

Answers

Which statement best compares potential and kinetic energy?

Answer: Out of all the options shown above the one that represents the statement that best compares potential and kinetic energy is answer choice B) Only kinetic energy increases when the velocity of an object increases. The reason being that kinetic energy is the energy of any object in motion while potential energy is the stored energy.

I hope it helps, Regards.

Taking into account the definition of kinetic and potencial energy, only kinetic energy increases when the velocity of an object increases.

Kinetic energy

Kinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.

Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and at rest, until it reaches a given speed. Once this point is reached, the amount of accumulated kinetic energy will remain the same unless there is a change in speed or the body returns to its state of rest by applying a force.

Kinetic energy is represented by the following formula:

Ec= ½ mv²

where:

  • Ec is the kinetic energy, which is measured in Joules (J).
  • m is the mass measured in kilograms (kg).
  • v is the speed measured in meters over seconds (m/s).

Potential energy

On the other hand, potential energy is the energy that measures the ability of a system to perform work based on its position. In other words, this is the energy that a body has at a certain height above the ground.

Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity.

So for an object with mass m, at height h, the expression applied to the gravitational energy of the object is:

Ep= m×g×h

where:

  • Ep is the potential energy in joules (J).
  • m is the mass in kilograms (kg).
  • h is the height in meters (m).
  • g is the acceleration of fall in m/s² (approximately 9.81 m/s²).

Statement that best compares potential and kinetic energy

In this case, considering all of the above, the correct answer is option B) Only kinetic energy increases when the velocity of an object increases.

Learn more about kinetic and potential energy:

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The ability of solid rock to flow is called _____. convection plasticity seafloor spreading seismology

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The ability of solid rock to flow is called Plasticity.


Plasticity is the deformation of a solid mateial which resulted in non reversible changes of shape in response to applied force.


Another example of plasticity is when you bend metal through a forcer force to create an art or kitchen set


Hope this Helps! Feel Free to mark me the brainliest!

Answer:

The ability of solid rock to flow is called Plasticity.

Explanation:

Plasticity is the deformation of a solid material which resulted in non reversible changes of shape in response to applied force.

How long will it take a projectile to hit the ground if it is launched at 4.2 m/s off a 12.6 m high platform?

Answers

Answer: 3

Explanation:

I think you are supposed to divided in those problems? I'm not sure but if you aren't then please let me know. The equation I did was:

12.6 / 4.2 = 3

Hope this helps!! :)

The ability/inability to conduct an electrical current is called:a. electrolyte
c. conductivity
b. malleability
d. composition

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c. conductivity
Think of it like this: CONDUCTivity.

Energy from the sun reaches Earth mostly by........... A)Conduction B)Convection C) Radiation D) Thermal Expansion.

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Energy from the sun reaches Earth mostly by  Radiation 

The energy from the sun reaches Earth mostly by radiation. The correct answer to the question is option C

How does energy from sun reaches the earth?

To determine the correct answer to the question, let us remind ourselves about how heat energy is been transferred. This is shown below:

Heat is a form of energy and can be transferred by:

  • Conduction: This happens mostly in solids and it involves direct contacts,
  • Convection: This happens mostly in liquids or gas in which a cooler part becomes hot by circulation of the hotter particles from the liquid or gaseous materials
  • Radiation: This involves the transfer of heat in the form of electromagnetic waves which requires no medium

From the above information, we can see that electromagnetic transmission (which includes light) requires no medium.

Thus, we can say that the energy from the sun reaches the earth by radiation. The correct answer to the question is option

Learn more about radiation:

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Tamika inflates and ties off a balloon in her classroom and then takes it outside on a cold, winter day. Immediately, she notices that the balloon has gotten a little bit smaller. Why does this occur?A) because there are fewer molecules in the balloon outside B) because the air pressure is significantly higher when it is colder C) because the molecules in the balloon have slowed down with the temperature D) because the molecules shrink in size when exposed to the colder, outside air