Answer:
-2.33 m/s²
Explanation:
The computation of the skateboarder’s acceleration is shown below;
Acceleration means the change in velocity per unit with respect to time.
In the given case, the initial velocity is 7 m/s.
As in the question it is mentioned that it comes to a stop, so the final velocity would be zero.
And, The time elapsed is 3 seconds.
Now the following equation should be used
a = (v,final - v,initial) ÷ t
= (0 - 7)/3
= -2.33 m/s²
Answer:
Becuase 
So then we can conclude that:
And that makes sense since the force 
needs to accelerate the two masses and 
just need to accelerate 
.
So the best option for this case would be:
a. T1 > T2
See explanation below.
Explanation:
For this case we consider the system as shown on the figure attached.
Since the system is connected the acceleration for both masses are equal, that is 
From the second Law of Newthon we have that the force applied for the mass is 
and we know that the force acting on the x axis for the mass 2 is 
so then we have that 
Now when we consider the system of 
as a whole mass, this system have the same acceleration 
and on this case we will see that the only force acting on the entire system would be and then by the second law of Newton we have that:
And then if we compare and we see that :
Becuase
So then we can conclude that:
And that makes sense since the force needs to accelerate the two masses and just need to accelerate .
So the best option for this case would be:
a. T1 > T2
stimulus. Because its the only thing I can really think of that evokes.
A light-year is a <u>distance</u>.
It's the distance that light travels through vacuum in one year.
The distance is 9.4607 x 10¹² kilometers in metric units, and 5.8786 x 10¹² miles
in 'customary' units, and is normally written without a bunch of question marks.
