Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 766 · 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 simple machine is a steering wheel? (a) pulley (b) wheel and axle (c) lever (d) inclined plane
2. 2.Which of these is a wheel and axle? (a) a crane hook block (b) a well winch handle (c) a wheelchair ramp (d) a crowbar
3. 3.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
4. 4.Which of these is caused by magnetic force? (a) pedalling a cycle (b) an apple falls down (c) shoes grip the floor (d) a magnet picks up pins
5. 5.🪝 A pulley system lifts a 200 N load with an effort of 100 N. What is its mechanical advantage (MA)?
6. 6.⚙️ Which simple machine is a seesaw? (a) wedge (b) lever (c) wheel and axle (d) inclined plane
7. 7.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a bent lever (d) a ramp wrapped round
8. 8.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a box pushed on carpet (d) a grippy rubber sole
10. 10.⚖️ A lever bar balances. The load is 150 N at ? cm from the fulcrum. The effort is 120 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
11. 11.⚖️ A seesaw balances. Zoya (400 N) sits 4 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.💪 Which force pulls everything towards the Earth? (a) magnetism (b) wind (c) friction (d) gravity
13. 13.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
14. 14.🔍 Which is the odd one out? (a) the tip of a nail (b) a window blind cord (c) a door stopper (d) a knife edge
15. 15.⚖️ A seesaw balances. Zoya (240 N) sits 2 m from the pivot on one side; Asha (240 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
16. 16.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 70 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
18. 18.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) friction (c) gravity (d) muscular force
19. 19.⚙️ Which simple machine is a knife edge? (a) wheel and axle (b) wedge (c) lever (d) screw
20. 20.⚖️ A lever bar balances. The load is 250 N at 30 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.⚖️ A seesaw balances. Zoya (200 N) sits 3 m from the pivot on one side; Ravi (300 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
22. 22.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 40 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
23. 23.⚖️ A lever bar balances. The load is 210 N at 40 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.💪 Which can a force NOT do? (a) change its colour (b) change its shape (c) stop it moving (d) start it moving
25. 25.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
26. 26.🔍 Which is the odd one out? (a) a steering wheel (b) a round doorknob (c) a well winch handle (d) a playground slide
27. 27.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
28. 28.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Kabir (140 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.True or false: a steering wheel is a pulley. (a) False (b) True
30. 30.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
32. 32.💪 A bag has a mass of 1 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 13 N, ice 4 N, a glass sheet 7 N, a wooden plank 11 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
34. 34.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 10 (d) 6
35. 35.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
36. 36.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
37. 37.⚖️ A seesaw balances. Arjun (540 N) sits 1 m from the pivot on one side; Zoya (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
38. 38.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) on the fulcrum (d) far from the fulcrum
39. 39.💪 Two children push a box to the right, one with 10 N and the other with 90 N. What is the net (total) force on the box, in newtons?
40. 40.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) use a smaller force (d) stop all friction

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