Question

Q4. Two points X and Y, are 120 m apart. M is the midpoint of X and Y. An object travels from X
to M in 12 seconds and then from M to Y at an average speed of 15 m/s. Find
a) The time taken for the object to travel from M to Y,
b) The average speed of the object for its entire journey from X to Y.​

Answer 1

Answer:

speed from M to Y is 60/15= 4 seconds

the average speed is 10m/s (because speed from X to M is 60/12=5)

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Answer 2

Answer:

a) 4sec

b) 7.5 m/s

Step-by-step explanation:

Given : M is the midpoint of X and Y

Object travels from X to M in 12 sec

Average speed of the object from M to Y is

15m/s .

(a) Average speed = total distance / total time

Distance between M and Y is 120/2 = 60m

15 = 60 / t

15t = 60

t = 60/15

t = 4 sec

(b) Average speed = total distance / total time

= 120 / 12 + 4

= 120 / 16

= 7.5 m/s