Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 888 · 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 force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
2. 2.Which of these is caused by gravity? (a) an apple falls down (b) a fridge magnet sticks (c) a magnet picks up pins (d) shoes grip the floor
3. 3.True or false: a grippy rubber sole gives more friction. (a) False (b) True
4. 4.True or false: a wheelchair ramp is a lever. (a) False (b) True
5. 5.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
6. 6.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
7. 7.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
8. 8.Which of these is caused by muscular force? (a) pedalling a cycle (b) rain falls to the ground (c) a thrown ball comes down (d) a compass needle turns
9. 9.Which of these is caused by magnetic force? (a) a fridge magnet sticks (b) rubbing hands warms them (c) lifting a school bag (d) squeezing a lemon
10. 10.💪 Which force is at work: brakes stop a bicycle? (a) gravity (b) friction (c) muscular force (d) magnetic force
11. 11.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
12. 12.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the effort (c) nothing (d) the fulcrum
13. 13.💪 Which can a force NOT do? (a) change its shape (b) stop it moving (c) change its colour (d) start it moving
14. 14.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
15. 15.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
16. 16.🏋️ 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?
17. 17.🪝 A winch has a wheel of radius 16 cm and an axle of radius 2 cm. What effort on the wheel lifts a 1040 N bucket on the axle, in newtons? (ideal)
18. 18.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) False (b) True
19. 19.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
20. 20.Which of these is a wheel and axle? (a) a door stopper (b) a bottle opener (c) a round doorknob (d) a wheelchair ramp
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
22. 22.Which of these is an inclined plane? (a) a playground slide (b) a nutcracker (c) a crowbar (d) a well winch handle
23. 23.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
24. 24.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
25. 25.🪝 A pulley system lifts a 260 N load with an effort of 130 N. What is its mechanical advantage (MA)?
26. 26.💪 In a tug of war, one team pulls right with 45 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
27. 27.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
28. 28.🏋️ A force of 300 N did 2400 J of work. How many metres did the object move?
29. 29.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 100 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) sand on a slippery path (d) a box pushed on carpet
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
32. 32.💪 Two children push a box to the right, one with 25 N and the other with 50 N. What is the net (total) force on the box, in newtons?
33. 33.🏋️ Pushing a crate 6 m took 540 J of work. What force was used, in newtons?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 3 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
35. 35.Which of these is caused by gravity? (a) rain falls to the ground (b) a fridge magnet sticks (c) pedalling a cycle (d) lifting a school bag
36. 36.🪝 More rope sections holding a load means … (a) more effort needed (b) less effort needed (c) the load floats (d) no change
37. 37.🪝 A load of 600 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
38. 38.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
39. 39.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
40. 40.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) wet (d) magnetic

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