Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 841 · 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.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
2. 2.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
3. 3.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the bar is short (d) the fulcrum moves
4. 4.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
5. 5.⚖️ A seesaw balances. Asha (330 N) sits 2 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 3 (c) class 2
7. 7.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
8. 8.⚙️ A screw is really … (a) a ramp wrapped round (b) a bent lever (c) a tiny pulley (d) a kind of wheel
9. 9.True or false: pulling up your socks is a push. (a) False (b) True
10. 10.💪 Which force is at work: lifting a school bag? (a) gravity (b) muscular force (c) friction (d) magnetic force
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 11 N, sandpaper 12 N, ice 4 N, a glass sheet 7 N. How many newtons more were needed on sandpaper than on ice?
12. 12.True or false: a fixed pulley stays in one place. (a) False (b) True
13. 13.Which of these is caused by muscular force? (a) squeezing a lemon (b) a compass needle turns (c) a thrown ball comes down (d) a river flows downhill
14. 14.⚙️ A wedge is … (a) a rope on a wheel (b) a wheel on a rod (c) two ramps back to back (d) a bar on a pivot
15. 15.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) farther from the pivot (d) anywhere
16. 16.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
17. 17.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
19. 19.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
20. 20.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
21. 21.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
22. 22.💪 In a tug of war, one team pulls left with 80 N and the other pulls right with 30 N. What is the size of the net force, in newtons?
23. 23.⚙️ Which simple machine is a jar lid? (a) wheel and axle (b) screw (c) wedge (d) inclined plane
24. 24.🔍 Which is the odd one out? (a) a seesaw (b) a window blind cord (c) a bottle opener (d) a claw hammer on a nail
25. 25.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
26. 26.True or false: a tyre with deep treads gives less friction. (a) False (b) True
27. 27.⚙️ Which simple machine is a bottle cap? (a) pulley (b) inclined plane (c) screw (d) lever
28. 28.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
29. 29.True or false: a seesaw is an inclined plane. (a) True (b) False
30. 30.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Arjun (600 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.True or false: pushing a trolley is a pull. (a) False (b) True
32. 32.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
33. 33.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
34. 34.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
35. 35.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, a glass sheet 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
37. 37.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
38. 38.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
39. 39.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 1 (c) class 2
40. 40.True or false: a pair of tweezers is a class 1 lever (fulcrum in the middle). (a) True (b) False

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