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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The combined momentum is 4000 kg m/s south
Explanation:
The total combined momentum of the two cars is given by the vector addition of the momenta of the two cars.
For this problem, we choose north as positive direction and south as negative direction.
The momentum of the first car travelling north is given by:
where
is the mass of the car
is its velocity
Substituting,
The momentum of the second car travelling south is given by:
where
is the mass of the car
is its velocity (negative because the car travels south)
Substituting,
And therefore, the combined momentum is
where the negative sign means the direction of the total momentum is south.
Learn more about momentum:
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