Explanation:
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LIULIS. What would happen to speed if distance increased in the same amount of time?
1 answer:
Answer:
The speed will be increased.
Explanation:
We can better understand this analysis, if we use numerical values and remember the expression or formula for speed. We know that speed is defined as the distance travelled at a given time.
So if we have the distance x = 4 [m] and the time 2 [s], the speed will be:
v = (4/2) = 2 [m/s]
And if we increase the distance to x = 10 [m] at the same time 2[s], the speed will be:
v = (10/2) = 5 [m/s]
So we can see that the speed is increased.
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1) 12.5 N east
There are two forces acting on the box along the horizontal direction:
- The applied force of 15 N east, we indicate it with F
- The force of friction of 2.5 N west, we indicate it with
Taking east as positive direction, we can write the two forces has
Therefore, the net force on the box will be:
And the positive sign means the direction is east.
2)
We can solve this part by using Newton's second law:
where
is the net force on the box
m is its mass
a is the acceleration
For the box in this problem,
(east)
m = 5.0 kg
Solving for a, we find the acceleration:
And the direction is the same as the net force (east)