Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 770 · 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 force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
2. 2.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
3. 3.🔍 Which is the odd one out? (a) a wood screw (b) a nut and bolt (c) a claw hammer on a nail (d) a bottle cap
4. 4.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) a rough doormat (d) a smooth steel slide
5. 5.⚖️ A lever bar balances. The load is 630 N at 40 cm from the fulcrum. The effort is 360 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
6. 6.⚖️ 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
7. 7.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
8. 8.⚖️ A seesaw balances. Meena (800 N) sits ? m from the pivot on one side; Arjun (800 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
9. 9.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
10. 10.True or false: sand on a slippery path gives less friction. (a) True (b) False
11. 11.⚖️ A lever bar balances. The load is 420 N at ? cm from the fulcrum. The effort is 210 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
12. 12.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
13. 13.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
14. 14.⚖️ 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
15. 15.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
16. 16.💪 Two children push a box to the right, one with 20 N and the other with 5 N. What is the net (total) force on the box, in newtons?
17. 17.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
18. 18.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) closer to the pivot (d) farther from the pivot
19. 19.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
20. 20.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 160 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.True or false: a truck loading ramp is an inclined plane. (a) False (b) True
22. 22.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 50 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.⚙️ Which simple machine is a screw jack? (a) wheel and axle (b) screw (c) pulley (d) wedge
25. 25.True or false: a seesaw is a lever. (a) False (b) True
26. 26.⚙️ Which simple machine is a truck loading ramp? (a) screw (b) inclined plane (c) pulley (d) wheel and axle
27. 27.⚙️ Which simple machine is a crowbar? (a) wheel and axle (b) inclined plane (c) wedge (d) lever
28. 28.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the pulley (d) the effort
29. 29.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
30. 30.🪝 A bucket weighing 450 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
31. 31.True or false: chalk on a gym bar gives less friction. (a) True (b) False
32. 32.Which of these is an inclined plane? (a) a road up a hill (b) a seesaw (c) a screw jack (d) a flagpole rope wheel
33. 33.🔍 Which is the odd one out? (a) a road up a hill (b) a jar lid (c) a wheelchair ramp (d) a playground slide
34. 34.⚙️ Which simple machine is a bottle opener? (a) screw (b) inclined plane (c) lever (d) pulley
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 10 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
36. 36.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
37. 37.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 250 N bucket on the axle, in newtons? (ideal)
38. 38.💪 A box weighs 120 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
39. 39.⚖️ A seesaw balances. Arjun (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?
40. 40.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 60 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?

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