Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 212 · 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 of these is caused by gravity? (a) squeezing a lemon (b) pedalling a cycle (c) a rolling ball slows (d) an apple falls down
2. 2.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
3. 3.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
4. 4.⚖️ A lever bar balances. The load is 60 N at 20 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.🔍 Which is the odd one out? (a) a crowbar (b) a water tap handle (c) a claw hammer on a nail (d) a seesaw
6. 6.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
7. 7.🪝 A well winch has a handle (wheel) of radius 35 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
8. 8.Which of these is caused by gravity? (a) brakes stop a bicycle (b) squeezing a lemon (c) a river flows downhill (d) a rolling ball slows
9. 9.⚙️ A wedge is … (a) two ramps back to back (b) a wheel on a rod (c) a rope on a wheel (d) a bar on a pivot
10. 10.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 2 (c) class 3
11. 11.🏋️ A force of 210 N pushes a cart 4 m along the floor. How much work is done, in joules?
12. 12.True or false: a box pushed on carpet gives less friction. (a) False (b) True
13. 13.⚙️ A screw is really … (a) a ramp wrapped round (b) a tiny pulley (c) a bent lever (d) a kind of wheel
14. 14.True or false: pulling a cart is a push. (a) True (b) False
15. 15.⚖️ A lever bar balances. The load is 80 N at 20 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.⚙️ Which simple machine is a door stopper? (a) screw (b) wheel and axle (c) wedge (d) lever
17. 17.⚖️ A seesaw balances. Zoya (200 N) sits 1 m from the pivot on one side; Meena (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
18. 18.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
19. 19.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
20. 20.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) gravity (d) unbalanced
21. 21.⚖️ A seesaw balances. Arjun (520 N) sits 3 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
23. 23.True or false: a crane hook block is a pulley. (a) False (b) True
24. 24.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 3 (c) class 2
25. 25.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
26. 26.True or false: a rough doormat gives more friction. (a) False (b) True
27. 27.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) a playground slide (b) a road up a hill (c) a crane hook block (d) a truck loading ramp
29. 29.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
30. 30.⚙️ Which simple machine is a road up a hill? (a) inclined plane (b) wheel and axle (c) pulley (d) screw
31. 31.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) gravity (c) muscular force (d) friction
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 100 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
33. 33.True or false: plucking a mango is a pull. (a) True (b) False
34. 34.True or false: pushing a trolley is a push. (a) True (b) False
35. 35.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
36. 36.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
37. 37.🪝 More rope sections holding a load means … (a) the load floats (b) more effort needed (c) no change (d) less effort needed
38. 38.True or false: a movable pulley stays in one place. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a bottle cap (b) a nut and bolt (c) a wood screw (d) a door stopper
40. 40.True or false: a smooth steel slide gives more friction. (a) False (b) True

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