Answer:
a.) the speed at the bottom is greater for the steeperhill
Explanation:
since the energy at the bottom of the steeper hilis greater
As we can see from above that v is higher when h ishigher.
Answer:
No, it does not.
Explanation:
According to the Law of Gravitation, something going down has more kinetic energy than something going up because it attracts pressure from around it when going down. When it goes up, it has less gravitational force and inertia also stops the ball from rolling upward. Therefore, without the amount of kinetic energy, it will not have the same amount of acceleration.
First of all, not to get confused with terminology, unit vectors are called unit vectors because they have a unit length. This has absolutely nothing to do with physical units.
Now, if you are talking about physical units like m, m/s or N. Then it depends on what physical vector quantity you’re talking about. If it’s the displacement vector then the i,j,k will have units of length i.e. meters (m). If it’s the force vector then the i,j,k will have units of force i.e. newtons (N).
But if you are talking about vectors in math, then they are unitless. So, we just pretend the physical unit is 1.
Again stressing that this has nothing to do with their name “unit vectors”. They are called that because the unit, AKA the number “1”, is the value of their magnitude/length.
They have magnitude 1, bearing the unit of physical quantity they represent.
Answer:
Explanation:
The answer is neutrons and protons. The proton for example is composed of 3 quarks with charges of 2/3 + 2/3 - 1/3 which gives an overall charge of 1.
Neutron are composed of 2 quarks that are - 1/3 in charge and 1 that has a charge of 2/3. The overall charge is 0.