A block of mass 1 kg slides down on an inclined plane with the angle of inclination of 30 0. Find the work done as the block slides through 50 cm. Find the work done by the block's weight as it slides through 50 cm. Find the work done against friction as the block slides through 1m. View Solution. Q4. A block of mass 250 g slides down Physics questions and answers. Work, Power and Energy Worksheet Work and Power 1. Calculate the work done by a 47 N force pushing a pencil 0.26 m 2. Calculate the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m against a force of 23 N. 3. Calculate the work done by a 2.4 N force pushing a 400. g sandwich across a table 0.75 m wide 4. You push a 15 kg box of books 2.0 m up a 25 o incline into the back of a moving van. The box moves at a constant velocity if you push it with a force of 95 N. Find a) the work done by normal force on the box, b) the work done by your push on the box, c) the work done by gravity on the box, and d) the work done by friction on the box. A bucket begins weighing 15 pounds, including the sand it holds. The bucket is to be lifted to the top of a 30 foot tall building by a rope of negligible weight. However, the bucket has a hole in it, and leaks 0.3 pounds of sand each foot it is lifted. Find the work done lifting the bucket to the top of the building in foot-pounds. Calculus questions and answers. 1. Use correct units! a) Calculate the amount of work done if a 418 lb. rat is lifted 10 feet off the ground. b) Convert weight to kilograms, distance to meters. (hundredths) c) Calculate work done, metric version. I foot = 0.305 meters 2.2 pounds = 1 kg (nearest unit) i) 418 lbs. = kg ii) 10 ft. = meters 2. A mass of 1000 kg is lifted 10 m in 10 seconds. The work done can be calculated as. W = (1000 kg) (9.81 m/s 2) (10 m) = 98100 J (Nm) The power required is work done per unit time. P = (98100 J) / (10 s) = 9810 W (J/s) = 9.8 kW. Example - Work done by an Electric Motor. The work done by a 1 kW electric motor in 1 hour can be calculated by FjXw.

find the work done when a 25 kg weight