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What Kepler's law conclude that the planets do not move with constant speed?
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Do planets revolve around the sun at the same speed?
A planet has an elliptical shaped orbit. It orbits with a constant angular speed, but a varying linear speed.
Why constant is used?
Constant is the speed of light and as the speed of light cannot change it is 'constant'
What is the speed of planets?
The speed of planets will vary as they travel at different speeds. Mercury is the fastest planet while Pluto is the slowest. The speed of the planets is influenced by how close they are to the sun.
Is constant speed constant velocity?
No. Velocity includes a direction vector, which speed does not have.
Why achanging velocity cannot maintaining constant speed?
A changing velocity can maintain constant speed if the motion is circular. The constant change in direction is a change in velocity, even if the speed is constant.
Is the speed at which the earth rotates constant?
No. Earth's rotation speed is affected by the gravitational pull of the sun, moon and planets.
What can you then conclude about the orbital speed of a planet in an elliptical orbit?
Kepler's Second Law: The planet moves faster when it is closer to the Sun.
If the plotted points on a speed time graph do not form a straight line what do you know about the objects acceleration?
You can conclude that the acceleration of the object is not constant.
Do planets revolve around the sun at the same speed?
A planet has an elliptical shaped orbit. It orbits with a constant angular speed, but a varying linear speed.
Why does moons orbit the planets?
because the planets' gravity pull them so that they do not go away and the moons revolve around them with a constant speed so they stay in their orbit
What is the different between constant velocity and constant speed?
constant velocity is when you maintain speed and direction, this usually is in a straight line, and constant speed means that your speed is always constant at all times.
Can you use average speed to calculate the speed of an object that is moving at a constant speed?
Yes. If an object is moving at a constant speed the average speed and the constant speed are the same.
Why constant is used?
Constant is the speed of light and as the speed of light cannot change it is 'constant'
Can an object have constant velocity and but variable speed?
No. Velocity has two parts, speed and direction A constant velocity means that both the speed and the direction must be constant. So a constant velocity must have a constant speed.
How do you know when energy transforms?
By observation, and deduction. If, for example, an object's speed increases, you can conclude that its kinetic energy increases. The energy, of course, must come from somewhere, so there is some sort of energy transformation. If a car maintains a constant speed despite friction, you can conclude that the energy lost to friction must be compensated - in this case, by the engine. Etc.
What is non-constant speed?
non-constant speed is when the speed for an object does not stay the same
What is non constant speed?
non-constant speed is when the speed for an object does not stay the same
