Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 394 · 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 smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
2. 2.True or false: a movable pulley only changes direction. (a) False (b) True
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
4. 4.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
5. 5.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
6. 6.🔍 Which is the odd one out? (a) a smooth steel slide (b) chalk on a gym bar (c) a tyre with deep treads (d) a box pushed on carpet
7. 7.💪 Two children push a box to the right, one with 85 N and the other with 100 N. What is the net (total) force on the box, in newtons?
8. 8.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed
9. 9.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Arjun (360 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
10. 10.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
11. 11.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) gravity (d) the colour of rope
12. 12.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
13. 13.True or false: a movable pulley rises with the load. (a) False (b) True
14. 14.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
15. 15.💪 In which unit do we measure force? (a) litre (L) (b) metre (m) (c) newton (N) (d) second (s)
16. 16.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
17. 17.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) False (b) True
18. 18.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
19. 19.True or false: skating on ice gives more friction. (a) True (b) False
20. 20.Which of these is a pulley? (a) a steering wheel (b) a road up a hill (c) a flagpole rope wheel (d) a wheelchair ramp
21. 21.True or false: a crane hook block is a wheel and axle. (a) True (b) False
22. 22.💪 A box weighs 290 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
24. 24.💪 Which force is at work: a rolling ball slows? (a) friction (b) muscular force (c) gravity (d) magnetic force
25. 25.💪 Two children push a box to the right, one with 55 N and the other with 10 N. What is the net (total) force on the box, in newtons?
26. 26.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a window blind cord (c) a playground slide (d) a flagpole rope wheel
27. 27.🔍 Which is the odd one out? (a) a seesaw (b) a bottle opener (c) a door stopper (d) a crowbar
28. 28.🪝 A pulley system lifts a 360 N load with an effort of 180 N. What is its mechanical advantage (MA)?
29. 29.⚖️ A lever bar balances. The load is 350 N at ? cm from the fulcrum. The effort is 280 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 12 (d) 6
31. 31.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
32. 32.🔍 Which is the odd one out? (a) a door stopper (b) a chisel (c) a crowbar (d) an axe blade
33. 33.🪝 A winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 600 N bucket on the axle, in newtons? (ideal)
34. 34.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
35. 35.💪 A box weighs 460 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
36. 36.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 2 (c) class 3
37. 37.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, sandpaper 10 N, ice 2 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
39. 39.Which of these is a lever? (a) a road up a hill (b) a wood screw (c) a window blind cord (d) a claw hammer on a nail
40. 40.True or false: a fixed pulley stays in one place. (a) True (b) False

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