Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 985 · 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 box weighs 480 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.🔍 Which is the odd one out? (a) the tip of a nail (b) a chisel (c) a crowbar (d) a door stopper
3. 3.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
4. 4.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
5. 5.⚙️ 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
6. 6.True or false: drawing up a well bucket is a push. (a) True (b) False
7. 7.🪝 A winch has a wheel of radius 28 cm and an axle of radius 4 cm. What effort on the wheel lifts a 420 N bucket on the axle, in newtons? (ideal)
8. 8.Which of these is a wedge? (a) a crowbar (b) a screw jack (c) a door stopper (d) a seesaw
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
10. 10.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) press parts harder (d) add sand
12. 12.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) both weights are equal (d) the bar is short
13. 13.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
14. 14.True or false: closing a drawer is a pull. (a) False (b) True
15. 15.💪 A box weighs 30 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 13 N, ice 3 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on a carpet than on ice?
17. 17.True or false: a wheelchair ramp is a lever. (a) True (b) False
18. 18.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to look nice (d) to grip the road
19. 19.🪝 A winch has a wheel of radius 25 cm and an axle of radius 5 cm. What effort on the wheel lifts a 400 N bucket on the axle, in newtons? (ideal)
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 3 N, sandpaper 5 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) ice (d) a carpet
21. 21.🏋️ A force of 80 N did 480 J of work. How many metres did the object move?
22. 22.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
23. 23.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
24. 24.True or false: opening a drawer is a pull. (a) False (b) True
25. 25.💪 A bag has a mass of 3 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
26. 26.⚙️ Which simple machine is a seesaw? (a) pulley (b) lever (c) wheel and axle (d) wedge
27. 27.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
28. 28.💪 A bag has a mass of 41 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
29. 29.True or false: a movable pulley halves the effort. (a) False (b) True
30. 30.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
31. 31.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
32. 32.True or false: hitting a cricket ball is a pull. (a) True (b) False
33. 33.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
34. 34.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
35. 35.⚖️ A lever bar balances. The load is 200 N at 10 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?
36. 36.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 80 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.💪 Which force pulls everything towards the Earth? (a) friction (b) magnetism (c) wind (d) gravity
38. 38.🪝 A pulley system lifts a 220 N load with an effort of 110 N. What is its mechanical advantage (MA)?
39. 39.🏋️ A force of 100 N did 100 J of work. How many metres did the object move?
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 70 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2

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