Answer:
u = 29.22 m/s
Explanation:
distance (s) = 58.52 m
coefficient of kinetic friction (k) = 0.75
final velocity (v) = 0 m/s
acceleration due to gravity (g) = 9.8 m/s^{2}
How fast was she driving (u)
we can get how fast she was driving by using the formula below
s = ut - 
...equation 1
where
- s = distance
- u = her initial velocity
- a = acceleration =
- k = coefficient of kinetic friction
- g = acceleration due to gravity
from v = u - at (recall that v = 0)
0 = u - at, therefore t = u/a = u/kg
now substituting the required values above into equation 1 we have
s = 
s = 
u = 
u = 
u = 29.22 m/s
Answer:
They don't have equal velocities
Explanation:
We have one bus travelling from Chicago to New York at 30 m/s and one bus travelling from Chicago to San Francisco at 30 m/s.
This is a cheat question. You need to remember that velocity is a vector. Remember that a vector has a direction and a module. So, the answer will be true, if both buses meet both conditions (direction and module). Let's start to analyze:
Module: In this case is 30 m/s for both buses
Direction: In this case is where the buses are heading. One is going to New York, and one is going to San Francisco. So the directions are different.
As module and direction are not the same for both buses we can say that they don't have equal velocities.
Answer:
False.
Explanation:
An aurora is a natural electric phenomenon that creates bright and colorful light displays in the sky. These dramatic and colorful lights are created when electrically charged particles from solar winds enter the Earth's atmosphere and interact with gases in the atmosphere.
You need to delete this question ASAP! You put out your first and last name.
