Answer:
Explanation:
initial velocity = 24m/s
final velocity = 0 ( since she is coming to a rest )
time = 12 s
∴ acceleration = final velocity - initial velocity / time
= 0 -24 / 12
= -24/12
= -2 m/s
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Answer: 140 m
Explanation:
Let's begin by stating clear that motiont is the change of position of a body at a certain time. So, during this motion, the balloon will have a trajectory and a displacement, being both different:
The<u> trajectory</u> is <u>the path followed by the body, the distance it travelled</u> (is a scalar quantity).
The displacement is <u>the distance in a straight line between the initial and final position</u> (is a vector quantity).
So, according to this, the distance the balloon traveled during the first 45 s (its trajectory) is 140 m.
But, if we talk about displacement, we have to draw a straight line between the initial position of the balloon (point 0) to its final position (point 90 m). Being its displacement 95 m.
Answer:
B. Momentum
Explanation:
There is a correlation between Momentum and Kinetic Energy. Both are variables that depend to some extent on speed and mass. Therefore, if a body has a certain speed, it will have a momentum and a kinetic energy.
If you write down the formulas for kinetic energy
and momentum
You can write the energy in terms of momentum
Despite this, there is an important difference: the moment is a vector quantity: it has a direction in space, these moments have the same ability to 'add up' in direction and magnitude as the vectors of forces for example. On the other hand, kinetic energy is a scalar quantity, which implies that it has no direction in space.
Answer:
non-zero
Explanation:
The tangential force acts as a circular moment on the body and increases its velocity, and also increases its kinetic energy.
In unequal circular movement work done on the object is non-zero. If the object's velocity increases in the tangential direction, the force is acting in the same direction.
Answer:
The part of the diagram thta is labeled number 3 is D. bronchi.
Explanation:
Bronchi are the airways that lead from the trachea to the lungs and they branch off into progressively smaller parts.