1) A weight lifter raises a 200N dumbbell through a height of 2m. Taking g = 10N/Kg, Calculate the work done. a) 50 J b) 150 J c) 300 J d) 400 J 2) A man pushes a crate with a force of 200 N and does 1000 J of work. How far does the crate move? a) 2.0 m b) 4.0 m c) 5.0 m d) 10.0 m 3) When a box is pulled 3m, 60 J of work is done. What is the applied force? a) 15 N b) 20 N c) 18 N d) 25 N 4) Which situation results in zero work done? a) Lifting a chair b) Pushing a stalled car that doesn’t move c) Dragging a bag along the floor d) Throwing a stone forward 5) What work is done when a boy pushes a 12 N box across a 5 m distance in 6 s? a) 60 J b) 72 J c) 360 J d) 400 J 6) A force of 50 N is applied, but the object moves in the opposite direction. What is the work done? a) Positive b) Zero c) Negative d) Can’t be determined 7) Find the work done when a force of 100 N pulls on a box at an angle of 60º, making it move through a horizontal distance of 40 m.  a) 200 N b) 4000 N c) 24000 N d) 30000 N 8) A person pushes a trolley at a constant speed of 1.5 m/s for 4 s with a force of 60 N in the direction of motion. What work is done? a) 240 J b) 300 J c) 320 J d) 360 J 9) How much work is done in raising a 50 Kg weight by 1.2 m? Take g = 10N/Kg a) 100 J b) 320 J c) 600 J d) 800 J 10) A person pushes a box with 30 N for 4 m, and another person pulls it in the same direction with 20 N at the same time. What total work is done? a) 160 J b) 200 J c) 210 d) 220 J

Calculate work using the appropriate formula

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