A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground.
Calculate the effort applied by the coolie.

A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground. Calculate the mechanical advantage of the inclined plane.

A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground. In actual practice, the coolie needs to apply more effort than what is calculated. Give one reason why you think the coolie needs to apply more effort.

A room is 4.5 m long 3.8 m broad . Calculate the area of the floor of the room.

A porter lifts a suitcase weighing 20 kg from the platform and puts it on his head 2.0 m above the platform. Calculate the work done by the porter on the suitcase.

porter lifts a luggage of 15 kg from the ground and puts it on his head 1.5 m above the ground. Calculate the work done by him on the luggage

A ladder, 25 m long reaches a window of building 20 m, above the ground. The distance of the foot of the ladder from the building.

A person's eye is at a height of 1.5 m . He stands infront of a 0.3 m long plane mirror whose lower end is 0.8m above the ground. The length of the image he sees of himself is

A ladder 25 m long reaches a window of a building 20 m above the ground. Determine the distance of the foot of the ladder from the building.

A person pushes a block of mass 4 kg up a frictionless inclined plane 10 m long and that makes an angle of 30^@ with the horizontal . Then the work done is

A ladder 25m long reaches a window of a building 20m above the ground. Determine the distance of the foot of the ladder from the building.