Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 810 · 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.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the axle (c) the load (d) the fulcrum
2. 2.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
3. 3.True or false: a wet tiled floor gives less friction. (a) True (b) False
4. 4.Which of these is a wheel and axle? (a) a chisel (b) an axe blade (c) a nutcracker (d) a steering wheel
5. 5.⚙️ Which simple machine is a door stopper? (a) pulley (b) inclined plane (c) screw (d) wedge
6. 6.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 240 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
7. 7.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
8. 8.💪 In a tug of war, one team pulls right with 90 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
9. 9.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
10. 10.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) True (b) False
12. 12.Which of these is a screw? (a) a wood screw (b) a crane hook block (c) a wheelchair ramp (d) an axe blade
13. 13.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 20 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a box pushed on carpet (d) a wet tiled floor
15. 15.💪 In a tug of war, one team pulls right with 85 N and the other pulls left with 15 N. What is the size of the net force, in newtons?
16. 16.💪 Which force is at work: a thrown ball comes down? (a) friction (b) muscular force (c) gravity (d) magnetic force
17. 17.🪝 A pulley system lifts a 240 N load with an effort of 80 N. What is its mechanical advantage (MA)?
18. 18.🛞 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 carpet 11 N, sandpaper 15 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
20. 20.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
21. 21.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
22. 22.🪝 A pulley system lifts a 270 N load with an effort of 90 N. What is its mechanical advantage (MA)?
23. 23.🪝 A load of 520 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
24. 24.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 3 (c) class 1
25. 25.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
26. 26.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the fulcrum (c) nothing (d) the load
27. 27.Which of these is caused by muscular force? (a) lifting a school bag (b) a thrown ball comes down (c) rain falls to the ground (d) a fridge magnet sticks
28. 28.🪝 A winch has a wheel of radius 10 cm and an axle of radius 2 cm. What effort on the wheel lifts a 350 N bucket on the axle, in newtons? (ideal)
29. 29.⚙️ Which simple machine is a truck loading ramp? (a) wheel and axle (b) inclined plane (c) screw (d) wedge
30. 30.⚖️ A seesaw balances. Kabir (220 N) sits 4 m from the pivot on one side; Arjun (440 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 11 N, sandpaper 15 N, ice 3 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
32. 32.🔍 Which is the odd one out? (a) a water tap handle (b) a claw hammer on a nail (c) a well winch handle (d) a round doorknob
33. 33.💪 Two children push a box to the right, one with 60 N and the other with 75 N. What is the net (total) force on the box, in newtons?
34. 34.True or false: the tip of a nail is a wedge. (a) True (b) False
35. 35.⚖️ A seesaw balances. Zoya (240 N) sits ? m from the pivot on one side; Asha (240 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
36. 36.🪝 A bucket weighing 120 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
37. 37.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
38. 38.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
39. 39.⚖️ A lever bar balances. The load is 640 N at 10 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 3 (c) class 1

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