Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 934 · 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 a lever? (a) a bottle cap (b) a road up a hill (c) a jar lid (d) a bottle opener
2. 2.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.🏋️ Pushing a crate 9 m took 3870 J of work. What force was used, in newtons?
4. 4.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
5. 5.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 3 (c) class 1
6. 6.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) the bar is short (d) turning effects match
7. 7.Which of these is a screw? (a) a seesaw (b) a knife edge (c) a nut and bolt (d) a claw hammer on a nail
8. 8.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the effort (d) the fulcrum
9. 9.True or false: a tyre with deep treads gives less friction. (a) False (b) True
10. 10.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
12. 12.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
13. 13.🪝 A load of 160 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
14. 14.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
15. 15.🔍 Which is the odd one out? (a) a water tap handle (b) a road up a hill (c) a playground slide (d) a wheelchair ramp
16. 16.True or false: a movable pulley needs effort = load. (a) False (b) True
17. 17.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) gravity (c) friction (d) muscular force
18. 18.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
19. 19.True or false: a smooth steel slide gives more friction. (a) True (b) False
20. 20.⚖️ A lever bar balances. The load is 200 N at 30 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?
21. 21.True or false: chalk on a gym bar gives more friction. (a) True (b) False
22. 22.🪝 A bucket weighing 340 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
23. 23.💪 A cart is pulled to the right with 75 N and to the left with 90 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
24. 24.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to look nice (d) to go slower
25. 25.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
26. 26.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) near the fulcrum (c) far from the fulcrum (d) on the fulcrum
27. 27.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 120 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.True or false: a wheelbarrow is a class 3 lever (effort in the middle). (a) True (b) False
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
30. 30.🔍 Which is the odd one out? (a) a knife edge (b) a water tap handle (c) a round doorknob (d) a steering wheel
31. 31.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
33. 33.⚖️ A lever bar balances. The load is 100 N at 50 cm from the fulcrum. The effort is 250 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.💪 A bag has a mass of 1 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
35. 35.⚖️ A lever bar balances. The load is 200 N at 50 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
37. 37.⚖️ A lever bar balances. The load is 360 N at ? cm from the fulcrum. The effort is 200 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
39. 39.🔍 Which is the odd one out? (a) a well winch handle (b) a steering wheel (c) a water tap handle (d) a seesaw
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 11 N, a carpet 15 N. How many newtons more were needed on a carpet than on ice?

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