Question

Assertion (A): A body cannot be in equilibrium if number of external forces act on it.
Reason (R): The vector sum of concurrent forces acting on a body may be zero.

Assertion (A): As we go up the surface of the earth, we feel light weighed than on the surface of the
earth.
Reason (R): The acceleration due to gravity decreases on going up above the surface of the earth.

Assertion(A): Mechanical energy of a body under the action of a conservative force remains conserved.
Reason (R): Force of friction is a non-conservative force.

Assertion (A): Moment of inertia of a body is a fixed quantity.
Reason (R ): Moment of inertia of a body depends on the axis of rotation of the body.

Assertion (A):Time of flight of a projectile is independent of mass of the projectile.
Reason (R ): Time of flight changes with angle

Answer 1

Explanation:

Assertion (A): A body cannot be in equilibrium if number of external forces act on it.

Reason (R): The vector sum of concurrent forces acting on a body may be zero.

Assertion (A): As we go up the surface of the earth, we feel light weighed than on the surface of the

earth.

Reason (R): The acceleration due to gravity decreases on going up above the surface of the earth.

Assertion(A): Mechanical energy of a body under the action of a conservative force remains conserved.

Reason (R): Force of friction is a non-conservative force.

Assertion (A): Moment of inertia of a body is a fixed quantity.

Reason (R ): Moment of inertia of a body depends on the axis of rotation of the body.

Assertion (A):Time of flight of a projectile is independent of mass of the projectile.

Reason (R ): Time of flight changes with angle

Answer 2

Answer:

Equation of the line passing through (1,1) and having equal intercepts on coordinate axes is

l)x+y+2=0

2)x-y-2 = 0

3)x-y+2=0

4)x+y-2=0