Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 289 · 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.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
2. 2.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
3. 3.💪 A cart is pulled to the right with 40 N and to the left with 25 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
4. 4.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Asha (200 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.True or false: pushing a swing is a push. (a) False (b) True
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
7. 7.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
9. 9.💪 In which unit do we measure force? (a) litre (L) (b) second (s) (c) newton (N) (d) metre (m)
10. 10.Which of these is a screw? (a) a crowbar (b) a jar lid (c) a well winch handle (d) a bottle opener
11. 11.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
12. 12.⚙️ Which simple machine is an axe blade? (a) pulley (b) screw (c) wedge (d) inclined plane
13. 13.🏋️ A force of 210 N pushes a cart 4 m along the floor. How much work is done, in joules?
14. 14.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
15. 15.⚙️ Which simple machine is a round doorknob? (a) wedge (b) inclined plane (c) lever (d) wheel and axle
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 0 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
17. 17.🔍 Which is the odd one out? (a) the tip of a nail (b) a wood screw (c) a door stopper (d) a knife edge
18. 18.💪 Which force is at work: brakes stop a bicycle? (a) magnetic force (b) gravity (c) friction (d) muscular force
19. 19.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) True (b) False
20. 20.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a nut and bolt (b) a round doorknob (c) a jar lid (d) a screw jack
22. 22.True or false: chalk on a gym bar gives more friction. (a) False (b) True
23. 23.True or false: a round doorknob is a wheel and axle. (a) False (b) True
24. 24.⚖️ A lever bar balances. The load is 250 N at 20 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.⚖️ What is the pivot point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
26. 26.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
27. 27.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Zoya (800 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) distance from fulcrum (d) colour of bar
29. 29.🏋️ A force of 70 N did 70 J of work. How many metres did the object move?
30. 30.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
31. 31.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a smaller rod (axle) (d) a sharp wedge
32. 32.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
33. 33.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 1 (c) class 3
34. 34.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) cold (d) wet
35. 35.⚙️ Which simple machine is a steering wheel? (a) wedge (b) pulley (c) wheel and axle (d) screw
36. 36.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
37. 37.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
38. 38.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
39. 39.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank

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