A child pulls a rope attached to a stone with a force of `80N`. The rope makes and angle of `40^(@)` to the ground. (i) Calculate the effective value of the pull tending to move the stone along the ground. (ii) Calculate the force tending to lift the stone.

From the top of a cliff of height 150 m, a stone is thrown up with a velocity of 19.6 m//s , at an angle of 60 ^(@) with the vertical . Calculate the distance of the point where it strickes on the ground from the foot of the cliff .

A lawn roller is pulled along a horizontal surface through a distance of 20 m by a rope with a force of 200 N . If the rope makes an angle of 60^@ with the vertical while pulling, the amount of work done by pulling force is

A child pulls a toy car through a distance of 10 meters on a smooth, horizontal floor. The string held in child's hand makes an angle of 60^(@) with the horizontal surface. If the force applied by the child be 5 N, calculate the work done by the child in pulling the toy car.

A circus artist is climbing from the ground along a rope stretched from the top of a vertical pole and tied at the ground. The height of the pole is 10 m and angle made by the top with ground level is 60^(@) . (i) Calculate the distance covered by the artist in climbing to the top of the pole. (ii) Which mathematical concept is used in this problem ? (iii) What is its value ?

A circus artist is climbing from the ground along a rope stretched from the top of a vertical pole and tied at the ground.The height of the pole is 12m and the angle made by the rope with ground level is 30o . Calculate the distance covered by the artist in climbing to the top of the pole.

A child pulls a toy car from a distance of 20 m on smooth and horizontal plane. The string held in child's hand makes an angle of 60^@ with horizontal surface. If the force applied by the child is 10 N. the work done by child in pulling the car is

In a game of tug-of-war, Mark pulls the rope with a force of 60 N from the right. Sandy and George pull the rope with respective forces of 40 N and 20 N from the left. The net force on the rope is

In a game of tug-o-war, Mark pulls the rope with a force of 60 N from the right. Sanday and George pull the rope with respective forces of 40 N and 20 N from the left, as shown in the given figure. The net force on the rope is