Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 232 · 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.True or false: closing a drawer is a push. (a) False (b) True
2. 2.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) colour of bar (d) distance from fulcrum
3. 3.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
4. 4.True or false: pulling up your socks is a pull. (a) True (b) False
5. 5.🏋️ Pushing a crate 6 m took 1140 J of work. What force was used, in newtons?
6. 6.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
7. 7.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
8. 8.True or false: a fixed pulley needs effort = load. (a) False (b) True
9. 9.🪝 More rope sections holding a load means … (a) more effort needed (b) less effort needed (c) no change (d) the load floats
10. 10.💪 Which force pulls everything towards the Earth? (a) magnetism (b) wind (c) friction (d) gravity
11. 11.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 50 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
13. 13.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
14. 14.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
15. 15.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Kabir (130 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
16. 16.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
17. 17.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
18. 18.⚙️ A wedge is … (a) two ramps back to back (b) a bar on a pivot (c) a rope on a wheel (d) a wheel on a rod
19. 19.True or false: a window blind cord is a pulley. (a) False (b) True
20. 20.⚖️ A seesaw balances. Arjun (480 N) sits 2 m from the pivot on one side; Zoya (240 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
21. 21.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) True (b) False
22. 22.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
23. 23.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
24. 24.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
25. 25.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
26. 26.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 55 N. What is the size of the net force, in newtons?
27. 27.🔍 Which is the odd one out? (a) a screw jack (b) a bottle cap (c) a wood screw (d) a window blind cord
28. 28.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) False (b) True
29. 29.Which of these is a wedge? (a) a truck loading ramp (b) a nutcracker (c) a crane hook block (d) a knife edge
30. 30.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
31. 31.💪 Which force is at work: an apple falls down? (a) muscular force (b) magnetic force (c) friction (d) gravity
32. 32.True or false: a flagpole rope wheel is a lever. (a) False (b) True
33. 33.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) anywhere (d) closer to the pivot
34. 34.🔍 Which is the odd one out? (a) a chisel (b) an axe blade (c) the tip of a nail (d) a nutcracker
35. 35.True or false: pulling a cart is a pull. (a) True (b) False
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 1 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
37. 37.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
38. 38.True or false: opening a drawer is a push. (a) False (b) True
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 14 N, ice 4 N, a glass sheet 8 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
40. 40.⚖️ A seesaw balances. Meena (600 N) sits ? m from the pivot on one side; Asha (600 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?

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