Centre of gravity of an equilateral triangle from its base is ............................
1/4 of height
1/2 of height
3/4 of height
1/3 of height
The point of intersection of two axes ( XX',YY' ) are called .............
I quadrant
II quadrant
III quadrant
Origin
The example for unstable equilibrium is ........................
a cube resting on its face
funnel standing on its tube end
funnel resting on its side
a bicycle on two wheels
In what quadrant the units ( 3,-7) will be plotted ?
I quadrant
II quadrant
III quadrant
Iv quadrant
In a graph ,X axis is called .....................
abscissa
ordinate
origin
quadrant
Calculate the mean value of the following data . 5,7,10,3,2,8,0,4,3,9
4.1
5.1
6.1
7.1
Find the mean of the first eight odd numbers .
6
7
8
10
A unifrom bar of length 1 metre and weighing 2 kg is supported on a smooth peg at one end and by a vertical string at a distance of 15 cm from the other end . Find the tension of the string.
18.1 kg
9.81 kg
11.8 kg
1.18 kg
If three forces of 30 kg ,35 kg, 55 kg respectively act on the same line and in the same direction . Fine their resultant force.
120 kg
110 kg
100 kg
140 kg
The S.I Unit of torque is ....................
newton / metre
newton - metre
kg / mˆ2
kg -m
The lower limit of the class interval 40-50 is..............
50
45
40
39
The length of the class intervals 0-9,10-19,20-29.......... Is..........
10
9
20
19
The mid value of a class intervel is called..............
class mark
class limit
range
mediam
Find the mean height of a group of 8 trainees whose heights in cm are 156,162,160,172,154,164,162,170.............
172
162.5
156
170
The aruthmetic mean of a,a-3,a+4,a-5 and a-1,is 6.Find the value of a
2.2
5
7
6
0
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