Well, first of all, if the ramps are perfectly frictionless, then the ball
won't roll ... it'll slide. Kind of like a bowling ball does at the beginning
of a shiny, highly-waxed lane. You need friction against the ball to roll it.
But in any case, no matter what the slopes of the ramps are, even
if they have different slopes, the ball will rise on the second ramp
to the same height from which it was released on the first ramp.
Adding or removing protons from the nucleus changes that atom atomic number so adding and removing protons from the nucleus changes what element that atom is for in example adding an proton to the nucleus of In atom of hydrogon creats an atom of helium
Answer:
Choices A, B, and C are correct.
Explanation:
Let us look at each of the choices one by one:
A. It is a vector
Yes. Velocity is a vector, or it's a speed with direction.
B. It is the change in displacement divided by the change in time.
Yes. The velocity can be written as
where 
is the displacement—a vector quantity.
C. It can be measured in meters per second.
Yes. The units of velocity are m/s, but also with a unit vector indicating the direction.
D. It is the slope of the acceleration vs. time graph.
Nope. The velocity is the slope of displacement vs. time graph.
Hence, only choices A, B, and C are correct.
Answer:
both magnitude and direction
Explanation:
The worker's pull on the handle of the cart is best described as the force having both magnitude and direction.
- This is a vector quantity
- The force is channeled to move the cart in a specific direction.
- Also, the pull on the cart can be quantified, and so it have magnitude.
- Most physical properties either have magnitude or direction or both.
In this case, the worker is pulling the cart towards a specified direction.
Therefore, the fitting choice is both magnitude and direction.
Answer: |F| = 1.28 x 10⁵ N
Explanation:
an impulse results in a change of momentum
FΔt = mΔv
F = m(vf - vi)/t
F = 2000(0 - 32) / 0.5
F = -128,000
|F| = 1.28 x 10⁵ N
