Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 275 · 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 pulley system has 1 rope section holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
2. 2.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
3. 3.⚙️ Which simple machine is a steering wheel? (a) screw (b) wheel and axle (c) wedge (d) inclined plane
4. 4.Which of these is caused by magnetic force? (a) pedalling a cycle (b) a magnet picks up pins (c) a river flows downhill (d) shoes grip the floor
5. 5.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Asha (480 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.Which of these is caused by friction? (a) a fridge magnet sticks (b) an apple falls down (c) rubbing hands warms them (d) a magnet picks up pins
7. 7.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) rain falls to the ground (c) shoes grip the floor (d) squeezing a lemon
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 3 N, a glass sheet 7 N, a wooden plank 8 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
9. 9.⚖️ 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
10. 10.🔍 Which is the odd one out? (a) a crowbar (b) a playground slide (c) a truck loading ramp (d) a road up a hill
11. 11.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Kabir (340 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.True or false: a fixed pulley rises with the load. (a) False (b) True
13. 13.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
14. 14.⚖️ A lever bar balances. The load is 360 N at 20 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 120 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
16. 16.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 2 (c) class 1
17. 17.⚖️ Turning effect = force × … (a) colour of bar (b) distance from fulcrum (c) time taken (d) mass of fulcrum
18. 18.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Kabir (260 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
20. 20.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 80 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 6 N, a carpet 9 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
24. 24.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
26. 26.Which of these is caused by muscular force? (a) rain falls to the ground (b) an apple falls down (c) lifting a school bag (d) brakes stop a bicycle
27. 27.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
28. 28.Which of these is a screw? (a) a bottle opener (b) a chisel (c) a nutcracker (d) a screw jack
29. 29.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
30. 30.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) gravity (d) the direction of pull
31. 31.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
32. 32.⚙️ Which simple machine is a round doorknob? (a) wedge (b) wheel and axle (c) pulley (d) inclined plane
33. 33.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) friction (c) gravity (d) magnetic force
34. 34.💪 A box weighs 190 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
35. 35.🪝 A winch has a wheel of radius 14 cm and an axle of radius 2 cm. What effort on the wheel lifts a 280 N bucket on the axle, in newtons? (ideal)
36. 36.⚖️ A lever bar balances. The load is 250 N at 40 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 2 (c) class 1
38. 38.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
39. 39.Which of these is a pulley? (a) a playground slide (b) a crane hook block (c) a chisel (d) the tip of a nail
40. 40.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?

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