Question

NOTE: Read the following and answer any THREE questions from 3(i) to 3(iv) (3M)
8. When a force makes an object move through some displacement along the direction of
the force, work is said to be done. We also know that displacement is the shortest distance
between two points i.e, initial position and final position.
i)
The work done on an object does not depend upon the:
a) Displacement
b) Force applied
c) Angle between force and displacement
d) Initial velocity of the object
A labourer having mass m, of 80kg carries a bag of mass mg of 10kg to the top
of a building 98m high. Find the work done if acceleration due to gravity is 9.8m/
11)
s2
a) 0°
a) 86736 Nm
b) 86636 Nm
c) 86536 Nm
d) 86436 Nm
iii) In case of negative work done the angle between the force and displacement is,
b) 45°
c) 90°
180°
iv)
The SI unit of work is named after a famous physicist who also contributed in
energy and power calculation. SI unit of work and energy is,
a) Newton
) Joule
c) Newton/metre
d) Watt
NOTE : Read the following
9. A highly important layer in earth's atmosphere filters out the harmful radiations coming
from the sun. Human activities have led to the reduction in thickness of this layer.
answer any two of the following
1 the presence of the following elements in substances lead to the above said problem
a magnesium and iron
b chlorine and flourine
c hydrogen and helium
d all of the above

ozone hole over Antarctica appears during
a summer
b Autumn
c spring
d winter
​

Answer 1

Answer:

• 1 (a)
• 2 (b)
• 3 (180°)
• 4 ( c)

Answer 2

Answer:

8) (i) d) displacement

(ii)

(iii) d) 180°

(iv) b) joule

9) i) b) chlorine and fluorine

ii) spring

Explanation:

note- there were only three questions asked in question 8 so I have left ii question

please please mark as brainliest