Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 786 · 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 balances when … (a) both weights are equal (b) turning effects match (c) the bar is short (d) the fulcrum moves
2. 2.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
3. 3.True or false: pushing a trolley is a push. (a) False (b) True
4. 4.True or false: a movable pulley halves the effort. (a) False (b) True
5. 5.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a smaller rod (axle) (c) a sharp wedge (d) a flat ramp
6. 6.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
7. 7.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) make parts rough (d) press parts harder
8. 8.Which of these is a lever? (a) a knife edge (b) a wheelchair ramp (c) a bottle opener (d) an axe blade
9. 9.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) anywhere (d) on the pivot
10. 10.🔍 Which is the odd one out? (a) a well winch handle (b) a road up a hill (c) a round doorknob (d) a water tap handle
11. 11.⚖️ A seesaw balances. Arjun (190 N) sits 3 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, a glass sheet 1 N, a wooden plank 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
14. 14.⚖️ A seesaw balances. Asha (400 N) sits 3 m from the pivot on one side; Arjun (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
15. 15.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 12 (d) 3
16. 16.🪝 A winch has a wheel of radius 15 cm and an axle of radius 3 cm. What effort on the wheel lifts a 150 N bucket on the axle, in newtons? (ideal)
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, a carpet 11 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) a wooden plank
18. 18.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
19. 19.🔍 Which is the odd one out? (a) a round doorknob (b) a well winch handle (c) a steering wheel (d) a door stopper
20. 20.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
21. 21.Which of these is an inclined plane? (a) a nut and bolt (b) a truck loading ramp (c) a flagpole rope wheel (d) a door stopper
22. 22.⚙️ Which simple machine is a crowbar? (a) lever (b) inclined plane (c) pulley (d) wedge
23. 23.Which of these is a wheel and axle? (a) a nutcracker (b) a bottle opener (c) a truck loading ramp (d) a round doorknob
24. 24.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
25. 25.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
26. 26.Which of these is caused by magnetic force? (a) a compass needle turns (b) squeezing a lemon (c) rain falls to the ground (d) pedalling a cycle
27. 27.True or false: the tip of a nail is a screw. (a) True (b) False
28. 28.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
29. 29.⚙️ A screw is really … (a) a kind of wheel (b) a ramp wrapped round (c) a bent lever (d) a tiny pulley
30. 30.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
31. 31.Which of these is a pulley? (a) a wheelchair ramp (b) a crane hook block (c) a screw jack (d) a playground slide
32. 32.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
33. 33.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a tyre with deep treads (c) a rough doormat (d) skating on ice
34. 34.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
35. 35.⚖️ A seesaw balances. Kabir (200 N) sits 1 m from the pivot on one side; Asha (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.🪝 A load of 280 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
38. 38.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
39. 39.True or false: a seesaw is a class 2 lever (load in the middle). (a) True (b) False
40. 40.Which of these is caused by muscular force? (a) shoes grip the floor (b) an apple falls down (c) lifting a school bag (d) a magnet picks up pins

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