Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 292 · 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 lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
2. 2.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
3. 3.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
4. 4.💪 Which force pulls everything towards the Earth? (a) wind (b) friction (c) magnetism (d) gravity
5. 5.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Asha (260 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.💪 In which unit do we measure force? (a) second (s) (b) metre (m) (c) newton (N) (d) litre (L)
7. 7.True or false: a round doorknob is a screw. (a) True (b) False
8. 8.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
9. 9.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
10. 10.🛞 Friction acts … (a) against the motion (b) only upwards (c) with the motion (d) only on ice
11. 11.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
12. 12.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
13. 13.🏋️ A force of 210 N did 420 J of work. How many metres did the object move?
14. 14.⚖️ A seesaw balances. Ravi (120 N) sits 4 m from the pivot on one side; Kabir (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
16. 16.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
17. 17.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
19. 19.Which of these is a screw? (a) a well-bucket rope wheel (b) a wheelchair ramp (c) an axe blade (d) a bottle cap
20. 20.True or false: a nutcracker is a lever. (a) False (b) True
21. 21.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to save rubber (d) to grip the road
22. 22.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
23. 23.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
24. 24.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Asha (220 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) chalk on a gym bar (d) a box pushed on carpet
26. 26.⚙️ Which simple machine is a well-bucket rope wheel? (a) lever (b) inclined plane (c) wheel and axle (d) pulley
27. 27.Which of these is a lever? (a) a knife edge (b) a claw hammer on a nail (c) the tip of a nail (d) a crane hook block
28. 28.🔍 Which is the odd one out? (a) a well winch handle (b) a water tap handle (c) a round doorknob (d) a well-bucket rope wheel
29. 29.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
30. 30.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
31. 31.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
32. 32.⚖️ A seesaw balances. Kabir (190 N) sits 3 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.🏋️ A force of 240 N did 1680 J of work. How many metres did the object move?
34. 34.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
35. 35.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
36. 36.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) the colour of rope (d) gravity
37. 37.Which of these is caused by gravity? (a) a thrown ball comes down (b) squeezing a lemon (c) a fridge magnet sticks (d) a compass needle turns
38. 38.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the fulcrum (d) the load
39. 39.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
40. 40.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley

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