Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 207 · 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.Which of these is caused by magnetic force? (a) shoes grip the floor (b) an apple falls down (c) brakes stop a bicycle (d) a magnet picks up pins
2. 2.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
3. 3.🏋️ A force of 240 N did 1200 J of work. How many metres did the object move?
4. 4.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
5. 5.⚙️ Which simple machine is a chisel? (a) wheel and axle (b) lever (c) wedge (d) pulley
6. 6.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
7. 7.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
8. 8.⚙️ Which simple machine is a bottle opener? (a) inclined plane (b) screw (c) lever (d) pulley
9. 9.⚙️ A screw is really … (a) a kind of wheel (b) a bent lever (c) a tiny pulley (d) a ramp wrapped round
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, sandpaper 9 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
11. 11.💪 Which can a force NOT do? (a) change its shape (b) stop it moving (c) change its colour (d) start it moving
12. 12.⚙️ Which simple machine is a jar lid? (a) wedge (b) pulley (c) lever (d) screw
13. 13.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 240 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.⚖️ A lever bar balances. The load is 60 N at 10 cm from the fulcrum. The effort is 30 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.True or false: hitting a cricket ball is a pull. (a) True (b) False
16. 16.Which of these is a wheel and axle? (a) a window blind cord (b) a round doorknob (c) a truck loading ramp (d) a bottle cap
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, ice 1 N, a wooden plank 2 N, a carpet 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) sandpaper (d) a wooden plank
18. 18.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
19. 19.⚙️ A wedge is … (a) a rope on a wheel (b) a bar on a pivot (c) a wheel on a rod (d) two ramps back to back
20. 20.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
21. 21.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) use a smaller force (c) make new energy (d) stop all friction
22. 22.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
23. 23.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) the axle
24. 24.🏋️ A force of 100 N pushes a cart 5 m along the floor. How much work is done, in joules?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
26. 26.True or false: a well-bucket rope wheel is an inclined plane. (a) True (b) False
27. 27.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
28. 28.💪 Two children push a box to the right, one with 90 N and the other with 20 N. What is the net (total) force on the box, in newtons?
29. 29.💪 In a tug of war, one team pulls left with 30 N and the other pulls right with 20 N. What is the size of the net force, in newtons?
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
31. 31.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) balanced (c) unbalanced (d) gravity
32. 32.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
33. 33.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
34. 34.⚖️ A lever bar balances. The load is 420 N at 40 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
36. 36.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
37. 37.True or false: pushing a swing is a pull. (a) True (b) False
38. 38.True or false: a crowbar is a class 3 lever (effort in the middle). (a) True (b) False
39. 39.🪝 A bucket weighing 300 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.⚖️ A lever bar balances. The load is 200 N at 50 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?

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