A rope of weight 0.5 kg/m hangs from a drum for a height of 6 m. The work done in winding up the rope will be

Related MCQs

• In a tug of war, five men pull a rope to the left at A and six moen pull the rope at B. A weight of 5 kg is hung vertically from the centre of the rope. In order that the rope AB be horizontal
• An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the windless makes 30 rpm. The efficiency of the inclined plane would be
• The breaking strength of a rope is 400 N. A fireman weighing 60 kg slides down the rope. The rope will break if
• A flywheel weighs 400 kg and has a radius of gyration of 30 cm about its axis of rotation. It is mounted on a shaft subjected to a moment of 40 kgm. If the flywheel starts from restits speed after 3 seconds wil be
• A jet of water of cross-sectional area 20 sq. cm impinges on a plate at an angle of 60? with a velocity of 10 m/sec. Neglecting the friction between the jet and plate (density of water 1000/9.81 kgm-1 sec2 per cubic meter), the force exerted by the jet on the plate would be in the range
• If four turms of rope around a horizontal post will hold a 100 kg weight with a pull of 1 kg, then
• What force is necessary to hold a weight of 100 kg suspended on a rope wrapped 3 times around a post
• A man lifts a stone weighting 300 g from the ground to a height of 2m and throws it horizontally with a velocity of 6 m/sec. The work done by the man is
• The work done in sliding a block of weight of 50 kg up a plane inclined at an angle of 30? to the horizontal so that the block is lifted through 1 m
• Water rises in a capillary tube to a height h. It will rise to a height more than h.