Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 509 · 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 wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a smaller rod (axle) (d) a sharp wedge
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
3. 3.🔍 Which is the odd one out? (a) a steering wheel (b) a road up a hill (c) a well winch handle (d) a water tap handle
4. 4.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
5. 5.True or false: sand on a slippery path gives less friction. (a) True (b) False
6. 6.True or false: a road up a hill is a pulley. (a) False (b) True
7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
8. 8.Which of these is a wheel and axle? (a) a seesaw (b) a claw hammer on a nail (c) a round doorknob (d) a bottle opener
9. 9.💪 A bag has a mass of 25 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
10. 10.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 1 (c) class 2
11. 11.Which of these is a pulley? (a) a door stopper (b) a well-bucket rope wheel (c) a road up a hill (d) a seesaw
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 5 N, a carpet 8 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
15. 15.🪝 A pulley system lifts a 690 N load with an effort of 230 N. What is its mechanical advantage (MA)?
16. 16.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the size of the load (d) the colour of rope
17. 17.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
18. 18.⚖️ A lever bar balances. The load is 280 N at ? cm from the fulcrum. The effort is 70 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.True or false: an axe blade is a wedge. (a) False (b) True
20. 20.⚖️ What is the pivot point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
21. 21.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) both weights are equal (d) turning effects match
22. 22.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Asha (800 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.Which of these is caused by gravity? (a) a river flows downhill (b) brakes stop a bicycle (c) shoes grip the floor (d) a fridge magnet sticks
24. 24.🛞 Friction acts … (a) against the motion (b) with the motion (c) only upwards (d) only on ice
25. 25.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
27. 27.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 240 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 14 N, ice 4 N, a wooden plank 8 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
29. 29.💪 A force is a … (a) type of sound (b) push or a pull (c) kind of colour (d) unit of time
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 60 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 12 N, a carpet 15 N. How many newtons more were needed on a carpet than on ice?
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 110 cm and the load at 70 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
33. 33.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) gravity (c) friction (d) muscular force
34. 34.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
35. 35.⚙️ Which simple machine is a well winch handle? (a) wheel and axle (b) screw (c) lever (d) wedge
36. 36.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
37. 37.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
38. 38.True or false: a pair of tweezers is a class 2 lever (load in the middle). (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a bottle cap (b) a truck loading ramp (c) a playground slide (d) a road up a hill
40. 40.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 3 (c) class 1

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