Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 5 · 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 bottle cap (b) a nut and bolt (c) a knife edge (d) a wood screw
2. 2.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
3. 3.True or false: a jar lid is a screw. (a) True (b) False
4. 4.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
6. 6.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
7. 7.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 11 N, a glass sheet 2 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
9. 9.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
10. 10.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) doubled (c) unbalanced (d) gravity
11. 11.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
12. 12.🪝 A load of 720 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
13. 13.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) oil the moving parts (d) add sand
14. 14.Which of these is a pulley? (a) a well-bucket rope wheel (b) a jar lid (c) a screw jack (d) a bottle cap
15. 15.🪝 A bucket weighing 200 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
16. 16.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?
17. 17.True or false: kicking a football is a push. (a) True (b) False
18. 18.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
19. 19.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
20. 20.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
23. 23.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 2 (c) class 3
24. 24.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 3 (c) class 1
25. 25.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?
26. 26.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) distance from fulcrum (d) time taken
27. 27.🪝 A pulley system lifts a 390 N load with an effort of 130 N. What is its mechanical advantage (MA)?
28. 28.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
29. 29.⚙️ Which simple machine is a seesaw? (a) screw (b) inclined plane (c) lever (d) pulley
30. 30.🔍 Which is the odd one out? (a) a knife edge (b) an axe blade (c) a truck loading ramp (d) a chisel
31. 31.⚖️ A seesaw balances. Kabir (110 N) sits 1 m from the pivot on one side; Meena (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
34. 34.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
35. 35.💪 Which force is at work: rain falls to the ground? (a) magnetic force (b) friction (c) muscular force (d) gravity
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 7 N, ice 1 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
37. 37.Which of these is a wheel and axle? (a) a well winch handle (b) a claw hammer on a nail (c) a bottle opener (d) the tip of a nail
38. 38.⚖️ A seesaw balances. Asha (390 N) sits 2 m from the pivot on one side; Meena (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
39. 39.🪝 What does a single fixed pulley change? (a) gravity (b) the direction of pull (c) the colour of rope (d) the size of the load
40. 40.🏋️ A force of 310 N did 2170 J of work. How many metres did the object move?

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