Answer:
Sound waves bend around the corners of various obstacles.
Explanation:
I took the test
Answer:
Explanation:
Since momentum is a vector, you, indeed, in <em>two dimension</em> collisions, you can decompose it in two components, the x-direction and the y-direction, such as you do with the force, which is a vector too.
The law of conservation of <em>momentum</em> states that the total momentum before and after the collision are conserved.
Let's assume a collision in one dimension: x-direction.
If object A is moving to the right, its momentum is to the right. If objcet B is at rest its momentum is zero. Then, if when object A collides with object B, the first stops, the second must move to the right with a momentum in the x-direction equal to the momentum that object A initially had.
You can apply the same reasoning if object A is moving in two dimensions, and, a similar one, if object B is not at rest: at the end the momentum in each direction before the collision has to be equal to the momentum in each direction after the collision.
Answer:
3
Explanation:
From the question given above, the following data were obtained:
Length (L) = 3 m
Height (H) = 1 m
Mechanical advantage (MA) =.?
The ideal mechanical advantage for the system can be obtained as follow:
MA = L/H
MA = 3/1
MA = 3
Therefore, the ideal mechanical advantage for the system is 3
Answer:
The elevator is not a inertial frame of reference.
Explanation:
Lets take load = W
The tension in the string =T
T= (1-0.1 )W
T=0.9 W
From Newtons second law
If elevator move up :
T- W = ma
T= W+ ma
It means that Tension is more than the W .But given that tension is 10% less than W.
If elevator move down:
W- T = m a
T= W - m a
Yes it is true.It means that elevator is moving downward.
So we can say that the elevator is not a inertial frame of reference.