Question

(a) An object is thrown up with a velocity of 20 m/s. Find
(1) The maximum height attained by it
(i) The total time taken by it to return back. (takes 10-
(b) Car A of mass 1500 kg travelling at 25 m/s i
1000kg travelling at 15 m/s in the same direction.
Als
becomes 20 m/s Calculate the velocity of car B after collision,
ICTION B (CHEMISTRY​

Answer 1

Answer:

A is the answer of this question

Answer 2

Answer:A Simplifying further, s = 20^2 /(2 x 10) = 20 m. Thus, the ball will attain a maximum height of 20 m. c) Since, the motion of the ball is symmetrical, it will take 2 seconds to rise upwards and 2 seconds to fall back to the ground. Thus, the total journey takes 4 s.Nov 12, 2018

Explanation:Bwhich it rises. (ii) The total time it takes to return to the surface of the earth. ... Let the maximum height reached and time taken to reach that height be H and t respectively. Assumption: ... NCERT Solution for Class 9 Science Chapter 10. 22 Qs ...

1 answer