Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 925 · 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.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
2. 2.True or false: skating on ice gives more friction. (a) False (b) True
3. 3.True or false: a round doorknob is a wheel and axle. (a) False (b) True
4. 4.🪝 A bucket weighing 90 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
5. 5.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the axle (d) the effort
6. 6.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) farther from the pivot (d) anywhere
7. 7.True or false: kicking a football is a push. (a) True (b) False
8. 8.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
9. 9.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
10. 10.💪 In a tug of war, one team pulls right with 85 N and the other pulls left with 70 N. What is the size of the net force, in newtons?
11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, a glass sheet 2 N, a wooden plank 5 N, a carpet 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
13. 13.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 250 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.True or false: a knife edge is a wedge. (a) True (b) False
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 13 N, ice 1 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
16. 16.💪 Two children push a box to the right, one with 5 N and the other with 20 N. What is the net (total) force on the box, in newtons?
17. 17.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
18. 18.🪝 A load of 600 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
19. 19.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
20. 20.⚖️ A lever bar balances. The load is 160 N at ? cm from the fulcrum. The effort is 20 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.💪 A cart is pulled to the right with 70 N and to the left with 55 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
22. 22.🪝 A well winch has a handle (wheel) of radius 35 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
23. 23.🏋️ A force of 490 N did 3430 J of work. How many metres did the object move?
24. 24.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) unbalanced (c) balanced (d) doubled
25. 25.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
26. 26.Which of these is caused by muscular force? (a) a river flows downhill (b) rain falls to the ground (c) a magnet picks up pins (d) pedalling a cycle
27. 27.⚖️ Turning effect = force × … (a) colour of bar (b) distance from fulcrum (c) mass of fulcrum (d) time taken
28. 28.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.⚙️ Which simple machine is a truck loading ramp? (a) lever (b) wheel and axle (c) pulley (d) inclined plane
30. 30.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
31. 31.💪 A cart is pulled to the right with 60 N and to the left with 70 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
32. 32.⚙️ Which simple machine is an axe blade? (a) wheel and axle (b) wedge (c) inclined plane (d) pulley
33. 33.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a glass sheet 3 N, a carpet 4 N. How many newtons more were needed on sandpaper than on ice?
35. 35.⚙️ Which simple machine is a water tap handle? (a) pulley (b) wheel and axle (c) lever (d) screw
36. 36.Which of these is caused by magnetic force? (a) pedalling a cycle (b) squeezing a lemon (c) shoes grip the floor (d) a compass needle turns
37. 37.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
38. 38.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) True (b) False
39. 39.🪝 A bucket weighing 410 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
40. 40.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) True (b) False

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