Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 694 · 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 box weighs 220 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 40 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
3. 3.⚙️ Which simple machine is a crowbar? (a) lever (b) inclined plane (c) wedge (d) pulley
4. 4.⚖️ A seesaw balances. Arjun (280 N) sits 4 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
6. 6.💪 In a tug of war, one team pulls left with 70 N and the other pulls right with 65 N. What is the size of the net force, in newtons?
7. 7.True or false: a movable pulley stays in one place. (a) True (b) False
8. 8.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the direction of pull (c) the size of the load (d) gravity
9. 9.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
10. 10.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 180 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
11. 11.True or false: hitting a cricket ball is a push. (a) False (b) True
12. 12.Which of these is caused by magnetic force? (a) a thrown ball comes down (b) a rolling ball slows (c) lifting a school bag (d) a fridge magnet sticks
13. 13.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
14. 14.⚖️ A seesaw balances. Kabir (190 N) sits ? m from the pivot on one side; Zoya (570 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
15. 15.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
17. 17.⚙️ Which simple machine is a road up a hill? (a) screw (b) inclined plane (c) lever (d) pulley
18. 18.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
19. 19.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 180 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
21. 21.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Arjun (100 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, ice 4 N, a wooden plank 5 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
23. 23.💪 A cart is pulled to the right with 70 N and to the left with 85 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
24. 24.⚙️ A screw is really … (a) a kind of wheel (b) a tiny pulley (c) a ramp wrapped round (d) a bent lever
25. 25.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
27. 27.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
28. 28.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) the load floats (d) less effort needed
29. 29.🪝 A bucket weighing 170 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) both weights are equal (d) turning effects match
31. 31.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
32. 32.🛞 Friction acts … (a) with the motion (b) against the motion (c) only on ice (d) only upwards
33. 33.Which of these is a wedge? (a) a jar lid (b) a crowbar (c) a flagpole rope wheel (d) a knife edge
34. 34.💪 Which force is at work: a compass needle turns? (a) gravity (b) magnetic force (c) muscular force (d) friction
35. 35.🪝 A load of 140 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
36. 36.⚙️ Which simple machine is a steering wheel? (a) lever (b) inclined plane (c) wedge (d) wheel and axle
37. 37.💪 A cart is pulled to the right with 90 N and to the left with 105 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
38. 38.💪 A force is a … (a) type of sound (b) unit of time (c) kind of colour (d) push or a pull
39. 39.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 200 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 3 N, a carpet 6 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?

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