3. For the questions given from a to f, find the corresponding answer from the 8

Question

3. For the questions given from a to f, find the corresponding answer from the 8. You must show your work for each answer using the attached blank sheet Label each part. (a) Between points (A) and (B). the acceleration is (b) Between points (c and (D) the acceleration is (c) Between points (G) and (H) the acceleration is (d) Between points (B) and (C). the distance is (e) Between points (F) and (G). the distance is Between points and J). the distance is Answer the following questions using the graph. Choose from the following answers. 1. Zero 2. Positive and constant 3. Positive and increasing 4. Positive and decreasing 5. Negative and constant 6. Negative with increasing magnitude 7. Negative with decreasing magnitude 8. Cannot be determined from the information given o 2 4 6 8 10 12 14 16 18 20 Time (t) Isl

Explanation / Answer

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a)

Please note that acceleration is defined as rate of change of velocity.

Since betweenpoints A and B, there is no change in velocity.

Hence Acceleration = 0 m/s^2

b)

Between points C and D

Acceleration = Change in velocity / Change in time

from graph, Change in time = 1 sec

from graph, Change in Velocity = 4-8 = -4 m/sec

Hence Acceleration = -4 m/s^2

Hence acceleration in negative and constant.

c)

Between points G and H

Acceleration = Change in velocity / Change in time

from graph, Change in time = 2 sec

from graph, Change in Velocity = 6-2 = 4 m/sec

Hence Acceleration = 4/2 = 2 m/s^2

Hence acceleration in positive and constant.

d) Distance = Velocity X Time

Between points B and C

Now since the velocity is changing distance can be calculated by taking mean velocity between B & C and multiplying with time.

Mean velocity = (0 + 8) / 2

= 4 m/s

Time taken = 1 sec

Distance = 4 X 1 = 4 m Solution

Ps:- Please note that as per chegg policies we are allowed to answer maximum 4 sub-parts of a question at a time. Thank you !!

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