Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 811 · 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 lever balances when … (a) the fulcrum moves (b) turning effects match (c) the bar is short (d) both weights are equal
2. 2.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
3. 3.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
4. 4.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a smooth steel slide (d) skating on ice
5. 5.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
6. 6.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
7. 7.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
8. 8.True or false: a well-bucket rope wheel is a pulley. (a) False (b) True
9. 9.True or false: drawing up a well bucket is a push. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) a round doorknob (b) a bottle opener (c) a steering wheel (d) a well winch handle
11. 11.True or false: closing a drawer is a push. (a) True (b) False
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, ice 4 N, a glass sheet 7 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 3 N, a glass sheet 7 N, a wooden plank 10 N. How many newtons more were needed on a carpet than on ice?
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 4 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on ice?
15. 15.⚙️ Which simple machine is a bottle cap? (a) inclined plane (b) screw (c) lever (d) wedge
16. 16.🪝 A winch has a wheel of radius 16 cm and an axle of radius 2 cm. What effort on the wheel lifts an 800 N bucket on the axle, in newtons? (ideal)
17. 17.⚙️ Which simple machine is a nutcracker? (a) lever (b) wheel and axle (c) wedge (d) pulley
18. 18.⚖️ A seesaw balances. Asha (200 N) sits ? m from the pivot on one side; Arjun (100 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
19. 19.🔍 Which is the odd one out? (a) a round doorknob (b) a window blind cord (c) a flagpole rope wheel (d) a crane hook block
20. 20.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 40 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
22. 22.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
23. 23.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
24. 24.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) False (b) True
25. 25.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) switch off gravity (c) make new energy (d) use a smaller force
26. 26.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
27. 27.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
28. 28.True or false: a movable pulley is on a flagpole top. (a) False (b) True
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 10 N, ice 1 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
30. 30.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
31. 31.💪 A force is a … (a) kind of colour (b) unit of time (c) push or a pull (d) type of sound
32. 32.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
33. 33.⚖️ Which class of lever is a crowbar? (a) class 1 (b) class 2 (c) class 3
34. 34.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
35. 35.💪 A box weighs 160 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
36. 36.True or false: pressing a doorbell is a push. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a jar lid (b) a screw jack (c) a wood screw (d) a playground slide
38. 38.Which of these is caused by muscular force? (a) rain falls to the ground (b) brakes stop a bicycle (c) a river flows downhill (d) pedalling a cycle
39. 39.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
40. 40.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) far from the fulcrum (c) on the rock (d) near the fulcrum

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