Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 846 · 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.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
2. 2.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) oil on a squeaky hinge (d) a smooth steel slide
3. 3.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
4. 4.🪝 A well winch has a handle (wheel) of radius 20 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
5. 5.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
6. 6.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
7. 7.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the pulley
8. 8.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) True (b) False
9. 9.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
10. 10.🪝 A pulley system lifts a 570 N load with an effort of 190 N. What is its mechanical advantage (MA)?
11. 11.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 80 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.True or false: a fishing rod is a class 2 lever (load in the middle). (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a water tap handle (b) a round doorknob (c) a well winch handle (d) an axe blade
14. 14.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
15. 15.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 100 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
17. 17.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 9 N, ice 2 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
19. 19.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
20. 20.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) far from the fulcrum (c) on the rock (d) near the fulcrum
21. 21.💪 In which unit do we measure force? (a) newton (N) (b) metre (m) (c) second (s) (d) litre (L)
22. 22.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
23. 23.True or false: pulling a cart is a pull. (a) True (b) False
24. 24.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 6 (c) 12 (d) 10
25. 25.True or false: a movable pulley stays in one place. (a) False (b) True
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 4 N, ice 1 N, a wooden plank 2 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
27. 27.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
28. 28.💪 Two children push a box to the right, one with 35 N and the other with 80 N. What is the net (total) force on the box, in newtons?
29. 29.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
30. 30.Which of these is an inclined plane? (a) a nutcracker (b) a wheelchair ramp (c) a screw jack (d) a water tap handle
31. 31.Which of these is caused by magnetic force? (a) pedalling a cycle (b) an apple falls down (c) a river flows downhill (d) a fridge magnet sticks
32. 32.⚙️ Which simple machine is a steering wheel? (a) inclined plane (b) pulley (c) screw (d) wheel and axle
33. 33.⚙️ Which simple machine is an axe blade? (a) wheel and axle (b) wedge (c) inclined plane (d) pulley
34. 34.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
35. 35.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
36. 36.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?
37. 37.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
38. 38.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
39. 39.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.Which of these is caused by gravity? (a) pedalling a cycle (b) brakes stop a bicycle (c) an apple falls down (d) shoes grip the floor

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