Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 201 · 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 smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
2. 2.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
3. 3.🪝 What does a single fixed pulley change? (a) the colour of rope (b) gravity (c) the direction of pull (d) the size of the load
4. 4.Which of these is caused by friction? (a) pedalling a cycle (b) a river flows downhill (c) brakes stop a bicycle (d) an apple falls down
5. 5.True or false: your forearm is a class 2 lever (load in the middle). (a) True (b) False
6. 6.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
7. 7.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
8. 8.🔍 Which is the odd one out? (a) a steering wheel (b) a water tap handle (c) a nutcracker (d) a well winch handle
9. 9.🛞 Rubbing your hands fast makes them … (a) wet (b) warm (c) magnetic (d) cold
10. 10.⚖️ A lever bar balances. The load is 90 N at ? cm from the fulcrum. The effort is 60 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
11. 11.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 2 (c) class 3
13. 13.⚖️ A lever bar balances. The load is 210 N at ? cm from the fulcrum. The effort is 280 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
15. 15.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
16. 16.Which of these is caused by muscular force? (a) an apple falls down (b) rubbing hands warms them (c) squeezing a lemon (d) shoes grip the floor
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, a carpet 10 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
18. 18.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
19. 19.🔍 Which is the odd one out? (a) a jar lid (b) a bottle cap (c) a wood screw (d) a claw hammer on a nail
20. 20.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
21. 21.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
22. 22.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 3 (c) class 2
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
24. 24.💪 In a tug of war, one team pulls right with 55 N and the other pulls left with 35 N. What is the size of the net force, in newtons?
25. 25.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
26. 26.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) the bar is short (d) turning effects match
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 box weighs 90 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
29. 29.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
30. 30.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
31. 31.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) True (b) False
32. 32.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a loose rope (d) a sharp wedge
33. 33.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
34. 34.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
35. 35.🪝 A bucket weighing 370 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
36. 36.💪 Which force is at work: lifting a school bag? (a) friction (b) magnetic force (c) gravity (d) muscular force
37. 37.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
38. 38.💪 A bag has a mass of 3 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
39. 39.True or false: drawing up a well bucket is a push. (a) True (b) False
40. 40.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem

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