From simple questions to complex issues, IDNLearn.com has the answers you need. Find in-depth and trustworthy answers to all your questions from our experienced community members.
Sagot :
a). is true. All motion is relative to a frame of reference. That's a fancy
way of saying that whenever you talk about a distance, an acceleration,
or a speed, they're always compared to something. Many surprising
things come out of this:
-- There's no such thing as "how fast is it really moving".
-- There's no such thing as "how high is it really".
-- There's no such thing as "really moving" or "really at rest".
What about quantities where you use distance or motion to calculate them ?
Like . . . . .
Potential energy . . . . . (mass) x (gravity) x (height)
Kinetic energy . . . . . (1/2) (mass) (speed)²
Momentum . . . . . (mass) x (speed) .
Yep, that's right. Those things are all relative to a frame of reference too;
different observers can get different answers,and they're all correct ... for
their own frame of reference.
Simple example:
You're flying in a passenger jet to visit your grandma.
In the frame of reference of somebody on the ground, you're moving at
400 miles per hour.
In the frame of reference of the pilot or the person sitting next to you,
you are at rest, and you can listen to your pod or read a book ... (or
maybe you're heavily at rest and taking a nap :-).)
We value your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. Thank you for trusting IDNLearn.com. We’re dedicated to providing accurate answers, so visit us again for more solutions.