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Recall that:
Impulse = Change in Momentum = mass × change in velocity
Since both cars are identical and have the same initial velocity of 60 mph, them breaking to a stop means that they both experience the same change in velocity.
Thus, both of the cars' impulses are equal.
Answer:
You cheated on a test, and you know it was the wrong thing to do. According to the psychoanalytic theory, what helped you know this?
The id controlled your biological response and made you sweaty because you were scared of getting caught.
The superego acted as your moral conscience; you just knew that it wasn't right to cheat.
The ego made you feel guilty as a defense mechanism. both B and C
Explanation:
the answer is both B,C
Answer:
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Explanation:
Hello
Here we must use the equation of motion
v^2 = u^2 + 2as; where v is final velocity, u is initial velocity, a is the acceleratoin and is the distance travelled.
We select this one because the time of collision is unknown to us.
We know the truck stopped so its final velocity is 0; thus v = 0.
Converting the initial velocity to SI units, we get 3.89 m/s.
The distance traveled, s, is 0.062 meters.
Inserting all of these values into the equation,
0 = (3.89)^2 + 2(a)(0.062)
and solving for a, we get a to be
-122.0 ms^(-2)
The negative sign indicates the acceleration is in the opposite direction to the initial motion, which means the truck decelerated. This is consistent with the given condition.
Answer:
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Explanation:
