Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 874 · 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 longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
2. 2.🛞 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 8 N, a carpet 10 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
3. 3.⚖️ Turning effect = force × … (a) mass of fulcrum (b) colour of bar (c) time taken (d) distance from fulcrum
4. 4.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 1 (c) class 2
5. 5.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
6. 6.True or false: a well winch handle is a pulley. (a) True (b) False
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
8. 8.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Asha (340 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
10. 10.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
11. 11.💪 A box weighs 560 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
12. 12.🏋️ A force of 280 N did 1680 J of work. How many metres did the object move?
13. 13.True or false: a tug of war is a pull. (a) True (b) False
14. 14.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) False (b) True
15. 15.True or false: a tug of war is a push. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) a road up a hill (b) a truck loading ramp (c) an axe blade (d) a playground slide
17. 17.⚖️ A lever bar balances. The load is 60 N at ? cm from the fulcrum. The effort is 20 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 3 (c) 10 (d) 12
19. 19.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
20. 20.True or false: a claw hammer on a nail is a lever. (a) False (b) True
21. 21.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
22. 22.Which of these is a screw? (a) a door stopper (b) a screw jack (c) a steering wheel (d) a flagpole rope wheel
23. 23.⚖️ A lever bar balances. The load is 500 N at ? cm from the fulcrum. The effort is 200 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
25. 25.🔍 Which is the odd one out? (a) a box pushed on carpet (b) sand on a slippery path (c) powder on a carrom board (d) a rough doormat
26. 26.True or false: a wheelchair ramp is a lever. (a) False (b) True
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 11 N, a carpet 13 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) a wooden plank
28. 28.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
29. 29.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
30. 30.True or false: a nutcracker is a class 2 lever (load in the middle). (a) False (b) True
31. 31.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) change its colour (d) stop it moving
32. 32.🔍 Which is the odd one out? (a) a round doorknob (b) a steering wheel (c) a road up a hill (d) a water tap handle
33. 33.🔍 Which is the odd one out? (a) a knife edge (b) a screw jack (c) a jar lid (d) a bottle cap
34. 34.🪝 A pulley system lifts a 320 N load with an effort of 80 N. What is its mechanical advantage (MA)?
35. 35.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, ice 1 N, a wooden plank 5 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
37. 37.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 160 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
38. 38.Which of these is a wedge? (a) a playground slide (b) a window blind cord (c) a well winch handle (d) a chisel
39. 39.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
40. 40.⚖️ A seesaw balances. Zoya (180 N) sits 2 m from the pivot on one side; Ravi (360 N) sits ? m from the pivot on the other side. What is the missing distance in metres?

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