Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 359 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.💪 Which force is at work: a river flows downhill? (a) friction (b) muscular force (c) gravity (d) magnetic force
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 10 cm and the load at 50 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
4. 4.True or false: hitting a cricket ball is a pull. (a) False (b) True
5. 5.🏋️ A force of 340 N did 2040 J of work. How many metres did the object move?
6. 6.Which of these is a lever? (a) a nut and bolt (b) a crane hook block (c) a window blind cord (d) a crowbar
7. 7.⚙️ Which simple machine is a well winch handle? (a) lever (b) pulley (c) inclined plane (d) wheel and axle
8. 8.⚙️ Which simple machine is a steering wheel? (a) wheel and axle (b) pulley (c) lever (d) inclined plane
9. 9.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
10. 10.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) mass of fulcrum (d) distance from fulcrum
11. 11.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
12. 12.🏋️ A force of 480 N did 4800 J of work. How many metres did the object move?
13. 13.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) use a smaller force (c) stop all friction (d) switch off gravity
14. 14.True or false: a fixed pulley needs effort = load. (a) True (b) False
15. 15.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
16. 16.🪝 A bucket weighing 290 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
17. 17.🔍 Which is the odd one out? (a) skating on ice (b) powder on a carrom board (c) oil on a squeaky hinge (d) a rough doormat
18. 18.💪 In a tug of war, one team pulls left with 25 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
19. 19.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
21. 21.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) the colour of rope (d) gravity
22. 22.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) skating on ice (d) a box pushed on carpet
23. 23.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a sharp wedge (d) a loose rope
24. 24.True or false: a movable pulley rises with the load. (a) True (b) False
25. 25.💪 Two children push a box to the right, one with 15 N and the other with 75 N. What is the net (total) force on the box, in newtons?
26. 26.⚙️ Which simple machine is a jar lid? (a) screw (b) wedge (c) pulley (d) wheel and axle
27. 27.🪝 A bucket weighing 410 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
28. 28.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
29. 29.⚖️ A seesaw balances. Asha (600 N) sits 4 m from the pivot on one side; Meena (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.⚖️ A lever bar balances. The load is 160 N at 50 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
31. 31.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
32. 32.💪 Which force is at work: a rolling ball slows? (a) friction (b) muscular force (c) magnetic force (d) gravity
33. 33.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) muscular force (c) gravity (d) friction
34. 34.⚙️ Which simple machine is a door stopper? (a) wheel and axle (b) screw (c) wedge (d) pulley
35. 35.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
36. 36.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
38. 38.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
39. 39.True or false: your forearm is a class 2 lever (load in the middle). (a) True (b) False
40. 40.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids