Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 756 · 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 wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a sharp wedge (d) a loose rope
2. 2.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
3. 3.🪝 A pulley system lifts a 440 N load with an effort of 220 N. What is its mechanical advantage (MA)?
4. 4.🔍 Which is the odd one out? (a) a steering wheel (b) a round doorknob (c) a seesaw (d) a well winch handle
5. 5.🔍 Which is the odd one out? (a) an axe blade (b) the tip of a nail (c) a crane hook block (d) a door stopper
6. 6.🏋️ A force of 480 N did 3360 J of work. How many metres did the object move?
7. 7.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
8. 8.True or false: a box pushed on carpet gives more friction. (a) False (b) True
9. 9.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
10. 10.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 2 (c) class 3
11. 11.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
12. 12.🔍 Which is the odd one out? (a) a playground slide (b) a truck loading ramp (c) a wheelchair ramp (d) a knife edge
13. 13.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) the pulley
14. 14.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
15. 15.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
16. 16.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) time taken (d) mass of fulcrum
17. 17.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 1 (c) class 2
18. 18.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
19. 19.💪 A bag has a mass of 16 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
20. 20.🪝 A pulley system lifts a 600 N load with an effort of 200 N. What is its mechanical advantage (MA)?
21. 21.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) gravity (c) balanced (d) unbalanced
22. 22.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
23. 23.⚖️ A lever bar balances. The load is 270 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
25. 25.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Ravi (180 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 90 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.🪝 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)
28. 28.⚖️ A lever bar balances. The load is 140 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?
29. 29.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
30. 30.💪 A box weighs 30 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
31. 31.⚖️ A lever bar balances. The load is 150 N at ? cm from the fulcrum. The effort is 30 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
32. 32.Which of these is a lever? (a) a screw jack (b) a knife edge (c) a well winch handle (d) a nutcracker
33. 33.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) turning effects match (d) the bar is short
34. 34.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
35. 35.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 3 (c) class 1
36. 36.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
37. 37.🪝 A well winch has a handle (wheel) of radius 35 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
38. 38.⚙️ Which simple machine is a bottle opener? (a) pulley (b) wedge (c) screw (d) lever
39. 39.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
40. 40.🔍 Which is the odd one out? (a) a road up a hill (b) a nutcracker (c) a crowbar (d) a bottle opener

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