Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 883 · 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.🔍 Which is the odd one out? (a) a nut and bolt (b) a screw jack (c) a water tap handle (d) a wood screw
2. 2.True or false: a fixed pulley rises with the load. (a) True (b) False
3. 3.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
4. 4.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
5. 5.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
6. 6.⚖️ A seesaw balances. Asha (640 N) sits ? m from the pivot on one side; Kabir (480 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
7. 7.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
8. 8.💪 Which force is at work: a rolling ball slows? (a) muscular force (b) gravity (c) friction (d) magnetic force
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 9 N, sandpaper 13 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
10. 10.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
11. 11.⚖️ A seesaw balances. Ravi (340 N) sits 2 m from the pivot on one side; Arjun (340 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
12. 12.True or false: a seesaw is a pulley. (a) True (b) False
13. 13.⚖️ A lever bar balances. The load is 90 N at ? cm from the fulcrum. The effort is 20 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
15. 15.🛞 How can we reduce friction in a machine? (a) add sand (b) oil the moving parts (c) make parts rough (d) press parts harder
16. 16.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) gravity (d) the direction of pull
17. 17.💪 Two children push a box to the right, one with 10 N and the other with 15 N. What is the net (total) force on the box, in newtons?
18. 18.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) more effort needed (d) no change
19. 19.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a glass sheet 5 N, a carpet 6 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
21. 21.💪 Which force is at work: an apple falls down? (a) muscular force (b) gravity (c) magnetic force (d) friction
22. 22.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wheel on ball bearings (c) a box pushed on carpet (d) sand on a slippery path
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
24. 24.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
25. 25.💪 Two children push a box to the right, one with 65 N and the other with 75 N. What is the net (total) force on the box, in newtons?
26. 26.Which of these is caused by muscular force? (a) rain falls to the ground (b) a compass needle turns (c) squeezing a lemon (d) an apple falls down
27. 27.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
28. 28.True or false: a bottle opener is a class 2 lever (load in the middle). (a) True (b) False
29. 29.True or false: a knife edge is a wedge. (a) True (b) False
30. 30.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
31. 31.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
32. 32.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the fulcrum (c) on the rock (d) near the fulcrum
33. 33.⚖️ A lever bar balances. The load is 150 N at 50 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.True or false: a movable pulley only changes direction. (a) True (b) False
35. 35.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
36. 36.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
37. 37.⚙️ Which simple machine is a screw jack? (a) lever (b) inclined plane (c) wedge (d) screw
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, a glass sheet 2 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
39. 39.⚖️ A lever bar balances. The load is 300 N at 10 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?

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