Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 873 · 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.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
2. 2.⚖️ A lever bar balances. The load is 180 N at 20 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
4. 4.💪 A cart is pulled to the right with 35 N and to the left with 50 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
5. 5.⚖️ A seesaw balances. Kabir (? N) sits 4 m from the pivot on one side; Meena (400 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 100 N bucket on the axle, in newtons? (ideal)
7. 7.🏋️ A force of 420 N did 2520 J of work. How many metres did the object move?
8. 8.🪝 A pulley system lifts a 340 N load with an effort of 170 N. What is its mechanical advantage (MA)?
9. 9.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) a rough doormat (d) oil on a squeaky hinge
10. 10.💪 A force is a … (a) unit of time (b) push or a pull (c) type of sound (d) kind of colour
11. 11.🪝 A bucket weighing 370 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
12. 12.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
13. 13.💪 Which force pulls everything towards the Earth? (a) friction (b) wind (c) magnetism (d) gravity
14. 14.🪝 A load of 880 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
15. 15.True or false: closing a drawer is a pull. (a) True (b) False
16. 16.True or false: a fixed pulley rises with the load. (a) True (b) False
17. 17.⚖️ A seesaw balances. Asha (120 N) sits 3 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 2 (c) class 1
19. 19.True or false: a fishing rod is a class 2 lever (load in the middle). (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) a wheel on ball bearings (d) a tyre with deep treads
21. 21.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the size of the load (d) the colour of rope
22. 22.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) False (b) True
23. 23.⚖️ A seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Asha (380 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
25. 25.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
26. 26.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
27. 27.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
28. 28.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
29. 29.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
30. 30.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
31. 31.Which of these is a screw? (a) a well winch handle (b) a nut and bolt (c) a flagpole rope wheel (d) a water tap handle
32. 32.True or false: a fixed pulley halves the effort. (a) True (b) False
33. 33.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
34. 34.True or false: kicking a football is a pull. (a) False (b) True
35. 35.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the pulley
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
37. 37.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
38. 38.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
39. 39.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
40. 40.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 270 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?

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