Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 996 · 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.💪 Two children push a box to the right, one with 60 N and the other with 80 N. What is the net (total) force on the box, in newtons?
2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
3. 3.⚙️ Which simple machine is a truck loading ramp? (a) inclined plane (b) lever (c) wheel and axle (d) pulley
4. 4.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
5. 5.True or false: a knife edge is a wedge. (a) False (b) True
6. 6.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
8. 8.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
9. 9.True or false: a box pushed on carpet gives more friction. (a) False (b) True
10. 10.⚙️ Which simple machine is a crane hook block? (a) lever (b) wheel and axle (c) wedge (d) pulley
11. 11.🪝 A pulley system lifts a 390 N load with an effort of 130 N. What is its mechanical advantage (MA)?
12. 12.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
13. 13.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
14. 14.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 5 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
17. 17.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the fulcrum (d) the load
18. 18.💪 A cart is pulled to the right with 100 N and to the left with 100 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
19. 19.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?
20. 20.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) closer to the pivot (c) on the pivot (d) anywhere
22. 22.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
23. 23.Which of these is a lever? (a) a wheelchair ramp (b) a well-bucket rope wheel (c) a crowbar (d) a well winch handle
24. 24.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
25. 25.💪 A cart is pulled to the right with 100 N and to the left with 105 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
26. 26.🔍 Which is the odd one out? (a) a knife edge (b) the tip of a nail (c) a well winch handle (d) an axe blade
27. 27.💪 Which force pulls everything towards the Earth? (a) wind (b) gravity (c) magnetism (d) friction
28. 28.Which of these is a pulley? (a) the tip of a nail (b) a steering wheel (c) a wood screw (d) a crane hook block
29. 29.True or false: a truck loading ramp is an inclined plane. (a) False (b) True
30. 30.⚖️ A lever bar balances. The load is 500 N at 50 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
31. 31.🛞 Friction acts … (a) only upwards (b) against the motion (c) with the motion (d) only on ice
32. 32.Which of these is caused by friction? (a) a rolling ball slows (b) squeezing a lemon (c) lifting a school bag (d) pedalling a cycle
33. 33.Which of these is an inclined plane? (a) a flagpole rope wheel (b) a crane hook block (c) a wheelchair ramp (d) a chisel
34. 34.🏋️ A force of 340 N did 1020 J of work. How many metres did the object move?
35. 35.💪 Which can a force NOT do? (a) stop it moving (b) change its shape (c) change its colour (d) start it moving
36. 36.True or false: pressing a doorbell is a push. (a) False (b) True
37. 37.True or false: a wood screw is a wedge. (a) True (b) False
38. 38.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) turning effects match (d) the bar is short
39. 39.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
40. 40.🪝 A pulley system lifts a 440 N load with an effort of 220 N. What is its mechanical advantage (MA)?

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