Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 761 · 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 screw is really … (a) a kind of wheel (b) a tiny pulley (c) a ramp wrapped round (d) a bent lever
2. 2.💪 A box weighs 100 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
3. 3.🪝 A load of 400 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
4. 4.💪 A bag has a mass of 45 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
5. 5.🪝 A load of 240 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
6. 6.True or false: closing a drawer is a pull. (a) True (b) False
7. 7.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
8. 8.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
9. 9.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
10. 10.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) magnetic force (c) friction (d) gravity
11. 11.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) colour of bar (d) time taken
12. 12.💪 A cart is pulled to the right with 50 N and to the left with 40 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
13. 13.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 80 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
15. 15.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) metre (m) (d) second (s)
16. 16.💪 Which force is at work: a rolling ball slows? (a) muscular force (b) gravity (c) magnetic force (d) friction
17. 17.True or false: a movable pulley only changes direction. (a) True (b) False
18. 18.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
19. 19.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Arjun (450 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.⚙️ Which simple machine is a nutcracker? (a) screw (b) wedge (c) lever (d) inclined plane
21. 21.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Kabir (570 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.True or false: a movable pulley halves the effort. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a grippy rubber sole (b) oil on a squeaky hinge (c) sand on a slippery path (d) chalk on a gym bar
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
25. 25.⚙️ Which simple machine is a claw hammer on a nail? (a) wheel and axle (b) lever (c) wedge (d) inclined plane
26. 26.🏋️ A force of 410 N did 4100 J of work. How many metres did the object move?
27. 27.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
28. 28.True or false: a wet tiled floor gives less friction. (a) False (b) True
29. 29.True or false: closing a drawer is a push. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) chalk on a gym bar (d) sand on a slippery path
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, ice 3 N, a glass sheet 4 N. How many newtons more were needed on a carpet than on ice?
32. 32.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
33. 33.True or false: pulling up your socks is a pull. (a) True (b) False
34. 34.Which of these is caused by friction? (a) a thrown ball comes down (b) a rolling ball slows (c) a fridge magnet sticks (d) rain falls to the ground
35. 35.Which of these is caused by magnetic force? (a) a river flows downhill (b) an apple falls down (c) a thrown ball comes down (d) a fridge magnet sticks
36. 36.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) nothing
37. 37.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Kabir (260 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
38. 38.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) the fulcrum moves (d) turning effects match
39. 39.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
40. 40.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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