Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 965 · 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.⚖️ A seesaw balances. Meena (480 N) sits ? m from the pivot on one side; Kabir (240 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
2. 2.💪 A box weighs 230 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
3. 3.Which of these is a wheel and axle? (a) a round doorknob (b) a nut and bolt (c) a well-bucket rope wheel (d) a seesaw
4. 4.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) two ramps back to back (d) a wheel on a rod
5. 5.⚖️ A seesaw balances. Zoya (440 N) sits 4 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 30 cm and the load at 90 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
8. 8.🔍 Which is the odd one out? (a) a rough doormat (b) a smooth steel slide (c) sand on a slippery path (d) a box pushed on carpet
9. 9.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) colour of bar (d) distance from fulcrum
10. 10.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
11. 11.⚙️ Which simple machine is a road up a hill? (a) wheel and axle (b) lever (c) pulley (d) inclined plane
12. 12.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) more effort needed (d) the load floats
13. 13.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
14. 14.Which of these is caused by gravity? (a) a river flows downhill (b) a magnet picks up pins (c) a rolling ball slows (d) a compass needle turns
15. 15.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
16. 16.⚖️ A seesaw balances. Arjun (480 N) sits 3 m from the pivot on one side; Ravi (480 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.💪 A cart is pulled to the right with 25 N and to the left with 20 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
18. 18.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
19. 19.🪝 A load of 750 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
20. 20.🔍 Which is the odd one out? (a) a chisel (b) an axe blade (c) a seesaw (d) the tip of a nail
21. 21.⚖️ A seesaw balances. Arjun (130 N) sits 2 m from the pivot on one side; Meena (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 300 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
23. 23.⚖️ A lever bar balances. The load is 500 N at 30 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) muscular force (c) gravity (d) friction
25. 25.True or false: a road up a hill is a pulley. (a) True (b) False
26. 26.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
27. 27.💪 Which force is at work: a fridge magnet sticks? (a) magnetic force (b) muscular force (c) friction (d) gravity
28. 28.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) farther from the pivot (d) anywhere
29. 29.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
30. 30.True or false: a fixed pulley halves the effort. (a) True (b) False
31. 31.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 2 (c) class 3
32. 32.True or false: a crane hook block is a pulley. (a) True (b) False
33. 33.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 2 (c) class 3
34. 34.⚖️ A seesaw balances. Meena (120 N) sits 2 m from the pivot on one side; Kabir (240 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
36. 36.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the fulcrum (c) the load (d) the effort
37. 37.⚙️ A screw is really … (a) a kind of wheel (b) a bent lever (c) a tiny pulley (d) a ramp wrapped round
38. 38.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
39. 39.⚖️ A lever bar balances. The load is 480 N at 40 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
40. 40.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?

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