Question

A particle moving in a straight line with constant
acceleration has speed 7m/s at A and 17m/s at
B.M is the mid point of AB. Find
(a) the average speed between A and M.
(b) the average speed between M and B.
(c) the ratio of the time to go from Ato M and that
from M to B​

Answer 1

Answer:

a the average speed between a and m

Answer 2

Answer:

Explanation:

heat from M to B is 3;2.

We know that v² - u² = 2as ,

17² - 7² = 2a * 2x

240 = 4ax

ax = 60

Now v'² - u² = 2ax

v'²  = u² + 2ax

     = 7² + 2ax

     = 49 + 2 * 60

     =  169

v' = 13 m/s

Now, v' = u + at1

or, 13 = 7 + at1

at1 = 6

Similarly, at2 = 17-13 = 4

Now, at1/at2 = 6/4

or, t1/t2 = 3/2 Answer.

t1:t2 = 3:2 .