Question

PLEASE SOLVE THIS .I WILL MARK AS BRAINLIEST AND I WILL THANKS TO THAT WHO WILL GIVE THE RIGHT AND APPLICABLE ANSWER

Answer 1

Answer : x=42

               y=48

Step-by-step explanation:

In straight line AC let(z) + 96 =180 ( supplementary angle)

z= 84

angle BOC = 84

in triangle BOC,

y +y + z =180

2y + 84 = 180 ( isosceles triangle)

y=48

In triangle ABC

A+B+C = 180 ( sum of angles of a triangle)

x + 90 + 48 = 180

x= 42

Answer 2

(i) If the displacement of the body is in the direction of force, then work done is positive.

Hence, W= F x S

For example: A coolie does work on the load when he raises it up against the force of gravity. The force exerted by coolie (=mg) and displacement, both are in upward direction.

(ii) If the displacement of the body is in the direction opposite to the force, then work done is negative.

Hence, W =- F x S

For example: When a body moves on a surface, the frictional forces between the body and the surface is in direction opposite to the motion of the body and so the work done by the force of friction is negative

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