Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 911 · 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 bucket weighing 340 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.True or false: a tyre with deep treads gives less friction. (a) True (b) False
3. 3.True or false: drawing up a well bucket is a push. (a) True (b) False
4. 4.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 20 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
6. 6.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
7. 7.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
8. 8.🪝 A pulley system lifts a 360 N load with an effort of 90 N. What is its mechanical advantage (MA)?
9. 9.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
10. 10.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Arjun (170 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
11. 11.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, ice 1 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
13. 13.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
14. 14.True or false: a bottle opener is a wedge. (a) True (b) False
15. 15.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
16. 16.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
17. 17.🔍 Which is the odd one out? (a) a crowbar (b) a bottle opener (c) a jar lid (d) a nutcracker
18. 18.True or false: a rough doormat gives more friction. (a) False (b) True
19. 19.💪 Which force is at work: an apple falls down? (a) muscular force (b) magnetic force (c) friction (d) gravity
20. 20.⚖️ A lever bar balances. The load is 150 N at 40 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.Which of these is caused by gravity? (a) shoes grip the floor (b) a magnet picks up pins (c) lifting a school bag (d) an apple falls down
22. 22.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 1 (c) class 2
23. 23.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) the axle
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 2 N, a wooden plank 4 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a wooden plank
25. 25.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
26. 26.🔍 Which is the odd one out? (a) a smooth steel slide (b) a box pushed on carpet (c) a rough doormat (d) sand on a slippery path
27. 27.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
28. 28.⚙️ Which simple machine is a screw jack? (a) screw (b) inclined plane (c) pulley (d) lever
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 4 N, a glass sheet 6 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
31. 31.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) cold (d) warm
32. 32.🏋️ Pushing a crate 9 m took 2430 J of work. What force was used, in newtons?
33. 33.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) on the rock (c) far from the fulcrum (d) near the fulcrum
34. 34.⚖️ A seesaw balances. Arjun (360 N) sits 1 m from the pivot on one side; Asha (120 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
37. 37.💪 A bag has a mass of 4 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 100 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
39. 39.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
40. 40.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids