Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 645 · 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 lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 50 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
2. 2.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a bottle opener (d) a well-bucket rope wheel
3. 3.True or false: a flagpole rope wheel is a pulley. (a) True (b) False
4. 4.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
5. 5.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) second (s) (d) newton (N)
6. 6.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
7. 7.🔍 Which is the odd one out? (a) a crane hook block (b) a flagpole rope wheel (c) a bottle opener (d) a well-bucket rope wheel
8. 8.Which of these is a pulley? (a) a door stopper (b) a window blind cord (c) a claw hammer on a nail (d) a bottle cap
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
10. 10.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
11. 11.🏋️ Pushing a crate 6 m took 1980 J of work. What force was used, in newtons?
12. 12.⚙️ Which simple machine is a nutcracker? (a) pulley (b) wheel and axle (c) lever (d) inclined plane
13. 13.💪 Two children push a box to the right, one with 40 N and the other with 30 N. What is the net (total) force on the box, in newtons?
14. 14.⚖️ A seesaw balances. Arjun (600 N) sits 3 m from the pivot on one side; Ravi (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
16. 16.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) far from the fulcrum (c) on the fulcrum (d) near the fulcrum
17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🪝 A bucket weighing 290 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
19. 19.True or false: drawing up a well bucket is a push. (a) False (b) True
20. 20.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
21. 21.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 350 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
23. 23.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
24. 24.True or false: a fixed pulley stays in one place. (a) True (b) False
25. 25.Which of these is caused by muscular force? (a) rubbing hands warms them (b) shoes grip the floor (c) lifting a school bag (d) a fridge magnet sticks
26. 26.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the fulcrum (c) nothing (d) the effort
27. 27.🪝 A pulley system lifts a 510 N load with an effort of 170 N. What is its mechanical advantage (MA)?
28. 28.True or false: a movable pulley needs effort = load. (a) True (b) False
29. 29.⚖️ A seesaw balances. Asha (100 N) sits ? m from the pivot on one side; Ravi (100 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
30. 30.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
31. 31.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) wet (d) warm
32. 32.True or false: a bottle opener is a class 3 lever (effort in the middle). (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) sand on a slippery path (d) a wet tiled floor
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
35. 35.⚙️ Which simple machine is a well winch handle? (a) pulley (b) inclined plane (c) lever (d) wheel and axle
36. 36.💪 A force is a … (a) kind of colour (b) unit of time (c) type of sound (d) push or a pull
37. 37.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
38. 38.💪 Which force pulls everything towards the Earth? (a) friction (b) wind (c) magnetism (d) gravity
39. 39.🛞 Friction acts … (a) with the motion (b) only upwards (c) against the motion (d) only on ice
40. 40.⚖️ A lever bar balances. The load is 150 N at ? cm from the fulcrum. The effort is 250 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?

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