Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 727 · 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) a wet tiled floor (b) a rough doormat (c) chalk on a gym bar (d) a grippy rubber sole
2. 2.🪝 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
3. 3.⚖️ A seesaw balances. Ravi (130 N) sits 4 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.True or false: a tyre with deep treads gives less friction. (a) True (b) False
5. 5.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
7. 7.⚖️ 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
8. 8.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
9. 9.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 180 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
11. 11.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) change its colour (d) stop it moving
12. 12.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
13. 13.💪 A cart is pulled to the right with 75 N and to the left with 90 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
14. 14.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) True (b) False
15. 15.⚖️ A seesaw balances. Asha (570 N) sits 3 m from the pivot on one side; Meena (570 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
16. 16.💪 Which force is at work: an apple falls down? (a) muscular force (b) gravity (c) magnetic force (d) friction
17. 17.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
18. 18.Which of these is an inclined plane? (a) a door stopper (b) a window blind cord (c) a seesaw (d) a wheelchair ramp
19. 19.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
20. 20.💪 In a tug of war, one team pulls left with 10 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
21. 21.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 210 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) a grippy rubber sole
23. 23.🔍 Which is the odd one out? (a) a crowbar (b) a round doorknob (c) a bottle opener (d) a nutcracker
24. 24.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to grip the road (d) to look nice
25. 25.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
26. 26.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
27. 27.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
28. 28.💪 In a tug of war, one team pulls right with 75 N and the other pulls left with 50 N. What is the size of the net force, in newtons?
29. 29.True or false: a movable pulley halves the effort. (a) False (b) True
30. 30.💪 A box weighs 390 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
31. 31.💪 A bag has a mass of 5 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
32. 32.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
33. 33.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
34. 34.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
35. 35.Which of these is caused by gravity? (a) squeezing a lemon (b) a river flows downhill (c) a fridge magnet sticks (d) a magnet picks up pins
36. 36.💪 Two children push a box to the right, one with 20 N and the other with 25 N. What is the net (total) force on the box, in newtons?
37. 37.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a truck loading ramp (c) a playground slide (d) a crowbar
38. 38.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
39. 39.True or false: pushing a swing is a pull. (a) False (b) True
40. 40.⚙️ A wedge is … (a) two ramps back to back (b) a bar on a pivot (c) a wheel on a rod (d) a rope on a wheel

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