Which statements about cirrus clouds are true? Choose all answers that are correct. A. Cirrus clouds form high in the sky. B. Ci
2 answers:
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(a)
In the first part of the motion, the car accelerates at rate , so the final velocity after a time t is:
Since it starts from rest,
u = 0
So the previous equation is
So the time taken for this part of the motion is
(1)
In the second part of the motion, the car decelerates at rate , until it reaches a final velocity of v2 = 0. The equation for the velocity is now
where v is the final velocity of the first part of the motion.
Re-arranging the equation,
(2)
So the total time taken for the trip is
(b)
In the first part of the motion, the distance travelled by the car is
Substituting u = 0 and (1), we find
In the second part of the motion, the distance travelled is
Substituting (2), we find
So the total distance travelled is
Answer: I added a picture of the answer
Explanation: its right
