A mass of 10 kg is a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.

What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer.

A man raises a mass m to a height 7j' and then shifts it horizontally by a length ’x'. What is the work done against the force of gravity?

What is the work done on a body of mass m moving around a horizontal circle of radius r?

An object thrown at a certain angle to the ground moves in a curved path and fails back to the ground.. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?

in what ratio does the point P(2,5) divide the line joining the points A(-8,9) and B(-6,9).

A rain drop of radius 2 mm falls from a height of 500 m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10 m s-^1 ?

Find the coordinates of the points which divide the line segment joining A(-2,2) and B(2,8) into four equal parts.

Find the ratio in which the line segment joining A(1,-5) and B(-4,5) is divided by the x-axis.Also find the coordinates of the point of division.

Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0 m apart on a horizontal table. What is the gravitational force and potential at the mid point of the line joining the centers of the spheres? Is an object placed at that point in equilibrium? If so, is the equilibrium stable or unstable?

A mass of 5.0 kg is pulled along a horizontal plane by a force in a direction making an angle 45° with the horizontal.The body moves with uniform velocity through a distance of 10 metre. Find the work done by the force(Co-efficient of firction=0.3).