Of petrol is 11 x 103 kcal per kg calculate the entienu
[4]
the engine.
ans: 31.15%
18.
unit 3: geometric optics
1. reflection at curved mirrors
19.
formulae
l os
1. relationship between focal length and radius of
curvature , f= .
2
1
1
n
2. mirror formula,
+
< 1
<
3. magnification, m = ñ
= u
<
short answer questions
1. 2074 set b q. no. 3a use graphical method to locate image of
an erect object placed before a concave mirror between its
pole and the focus. hence write down the nature of image so
formed.
[2]

measure their densities same density, same sub

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.