Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 678 · 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.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) powder on a carrom board (d) chalk on a gym bar
2. 2.True or false: powder on a carrom board gives less friction. (a) True (b) False
3. 3.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🔍 Which is the odd one out? (a) a water tap handle (b) a road up a hill (c) a playground slide (d) a wheelchair ramp
5. 5.🔍 Which is the odd one out? (a) an axe blade (b) the tip of a nail (c) a chisel (d) a well-bucket rope wheel
6. 6.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a playground slide (c) a truck loading ramp (d) a nutcracker
7. 7.🪝 More rope sections holding a load means … (a) no change (b) less effort needed (c) more effort needed (d) the load floats
8. 8.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) far from the fulcrum (d) on the fulcrum
9. 9.⚙️ A wedge is … (a) a wheel on a rod (b) two ramps back to back (c) a rope on a wheel (d) a bar on a pivot
10. 10.💪 Two children push a box to the right, one with 85 N and the other with 30 N. What is the net (total) force on the box, in newtons?
11. 11.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
12. 12.Which of these is an inclined plane? (a) a flagpole rope wheel (b) a steering wheel (c) a screw jack (d) a truck loading ramp
13. 13.💪 Two children push a box to the right, one with 45 N and the other with 40 N. What is the net (total) force on the box, in newtons?
14. 14.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
15. 15.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) False (b) True
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, ice 3 N, a glass sheet 4 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
17. 17.🏋️ A 13 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.🪝 What does a single fixed pulley change? (a) the size of the load (b) the direction of pull (c) the colour of rope (d) gravity
19. 19.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
20. 20.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 50 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
23. 23.💪 In a tug of war, one team pulls right with 95 N and the other pulls left with 60 N. What is the size of the net force, in newtons?
24. 24.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
25. 25.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) ice (d) glass
26. 26.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Ravi (330 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
28. 28.Which of these is a wheel and axle? (a) a seesaw (b) an axe blade (c) a steering wheel (d) a knife edge
29. 29.🪝 A pulley system lifts a 480 N load with an effort of 120 N. What is its mechanical advantage (MA)?
30. 30.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
31. 31.⚙️ A screw is really … (a) a ramp wrapped round (b) a tiny pulley (c) a bent lever (d) a kind of wheel
32. 32.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 3 (d) 10
33. 33.🔍 Which is the odd one out? (a) a truck loading ramp (b) a road up a hill (c) a wheelchair ramp (d) a seesaw
34. 34.🪝 A load of 400 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
35. 35.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
36. 36.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
37. 37.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
38. 38.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
39. 39.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
40. 40.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere

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