Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 377 · 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.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) press parts harder (d) add sand
2. 2.🏋️ Pushing a crate 10 m took 2500 J of work. What force was used, in newtons?
3. 3.Which of these is caused by muscular force? (a) a compass needle turns (b) rain falls to the ground (c) a river flows downhill (d) lifting a school bag
4. 4.True or false: a seesaw is a class 2 lever (load in the middle). (a) True (b) False
5. 5.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) mass of fulcrum (d) distance from fulcrum
6. 6.Which of these is caused by friction? (a) an apple falls down (b) a thrown ball comes down (c) rubbing hands warms them (d) rain falls to the ground
7. 7.True or false: a movable pulley only changes direction. (a) False (b) True
8. 8.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 6 (d) 12
9. 9.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
10. 10.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) balanced (c) doubled (d) gravity
11. 11.⚖️ A seesaw balances. Ravi (380 N) sits 1 m from the pivot on one side; Asha (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
13. 13.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
14. 14.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) the fulcrum moves (d) turning effects match
15. 15.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
17. 17.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
18. 18.True or false: a box pushed on carpet gives less friction. (a) False (b) True
19. 19.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
20. 20.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 1 (c) class 2
21. 21.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
22. 22.🪝 A bucket weighing 470 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 seesaw balances. Kabir (380 N) sits ? m from the pivot on one side; Zoya (380 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
24. 24.⚙️ Which simple machine is the tip of a nail? (a) pulley (b) wheel and axle (c) wedge (d) lever
25. 25.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
26. 26.💪 Which force is at work: a thrown ball comes down? (a) muscular force (b) gravity (c) friction (d) magnetic force
27. 27.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
28. 28.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 1 (c) class 2
29. 29.⚖️ A seesaw balances. Asha (340 N) sits 3 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.💪 A box weighs 500 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
31. 31.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to grip the road (d) to go slower
32. 32.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a bottle opener (c) a crane hook block (d) a nutcracker
33. 33.🪝 A load of 140 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
34. 34.True or false: a flagpole rope wheel is a pulley. (a) False (b) True
35. 35.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 9 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
37. 37.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 3 (c) class 1
38. 38.⚙️ Which simple machine is a water tap handle? (a) lever (b) screw (c) wheel and axle (d) wedge
39. 39.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
40. 40.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction

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