Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 702 · 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 force pulls everything towards the Earth? (a) magnetism (b) wind (c) friction (d) gravity
2. 2.⚙️ Which simple machine is a water tap handle? (a) wedge (b) lever (c) inclined plane (d) wheel and axle
3. 3.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
4. 4.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
5. 5.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
6. 6.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
7. 7.⚙️ Which simple machine is a round doorknob? (a) wedge (b) wheel and axle (c) lever (d) screw
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 9 N, ice 2 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
9. 9.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
10. 10.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
11. 11.True or false: a wood screw is a screw. (a) True (b) False
12. 12.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
13. 13.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) squeezing a lemon (c) brakes stop a bicycle (d) shoes grip the floor
14. 14.🪝 A bucket weighing 280 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
15. 15.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) True (b) False
16. 16.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
17. 17.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
18. 18.⚖️ A lever bar balances. The load is 180 N at 10 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 12 N, ice 3 N, a wooden plank 7 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
21. 21.🛞 How can we reduce friction in a machine? (a) add sand (b) oil the moving parts (c) make parts rough (d) press parts harder
22. 22.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
23. 23.Which of these is a pulley? (a) a bottle opener (b) a truck loading ramp (c) a round doorknob (d) a window blind cord
24. 24.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
25. 25.🛞 Friction acts … (a) only upwards (b) with the motion (c) against the motion (d) only on ice
26. 26.🏋️ Pushing a crate 10 m took 700 J of work. What force was used, in newtons?
27. 27.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
28. 28.Which of these is an inclined plane? (a) the tip of a nail (b) an axe blade (c) a nutcracker (d) a wheelchair ramp
29. 29.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
30. 30.🪝 A winch has a wheel of radius 8 cm and an axle of radius 4 cm. What effort on the wheel lifts a 260 N bucket on the axle, in newtons? (ideal)
31. 31.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
33. 33.Which of these is an inclined plane? (a) a nut and bolt (b) a crane hook block (c) a truck loading ramp (d) a jar lid
34. 34.⚙️ Which simple machine is a well winch handle? (a) pulley (b) wedge (c) screw (d) wheel and axle
35. 35.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
36. 36.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) the direction of pull (d) gravity
37. 37.True or false: pulling up your socks is a pull. (a) False (b) True
38. 38.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) both weights are equal (d) the fulcrum moves
39. 39.🔍 Which is the odd one out? (a) sand on a slippery path (b) oil on a squeaky hinge (c) a smooth steel slide (d) skating on ice
40. 40.🪝 A winch has a wheel of radius 20 cm and an axle of radius 4 cm. What effort on the wheel lifts a 950 N bucket on the axle, in newtons? (ideal)

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