Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 116 · 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.🏋️ Pushing a crate 8 m took 2880 J of work. What force was used, in newtons?
2. 2.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
3. 3.Which of these is caused by magnetic force? (a) a fridge magnet sticks (b) a thrown ball comes down (c) lifting a school bag (d) rain falls to the ground
4. 4.🛞 Friction acts … (a) against the motion (b) with the motion (c) only on ice (d) only upwards
5. 5.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
6. 6.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) mass of fulcrum (d) distance from fulcrum
7. 7.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
8. 8.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 2 N, a glass sheet 6 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
11. 11.True or false: a box pushed on carpet gives more friction. (a) False (b) True
12. 12.💪 Which force pulls everything towards the Earth? (a) wind (b) gravity (c) magnetism (d) friction
13. 13.True or false: a rough doormat gives less friction. (a) False (b) True
14. 14.True or false: a window blind cord is a screw. (a) True (b) False
15. 15.⚙️ Which simple machine is a window blind cord? (a) pulley (b) inclined plane (c) wedge (d) screw
16. 16.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) litre (L) (d) newton (N)
17. 17.Which of these is caused by gravity? (a) an apple falls down (b) a magnet picks up pins (c) brakes stop a bicycle (d) a rolling ball slows
18. 18.⚖️ 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
19. 19.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
21. 21.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
22. 22.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
23. 23.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) a grippy rubber sole (d) powder on a carrom board
24. 24.⚖️ A lever bar balances. The load is 70 N at 50 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.Which of these is a pulley? (a) a claw hammer on a nail (b) a wood screw (c) a chisel (d) a window blind cord
26. 26.Which of these is a lever? (a) a screw jack (b) a window blind cord (c) a crowbar (d) a crane hook block
27. 27.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
28. 28.True or false: a tug of war is a pull. (a) False (b) True
29. 29.True or false: closing a drawer is a pull. (a) True (b) False
30. 30.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
31. 31.Which of these is a wedge? (a) a door stopper (b) a screw jack (c) a road up a hill (d) a steering wheel
32. 32.True or false: kicking a football is a pull. (a) True (b) False
33. 33.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) use a smaller force (c) switch off gravity (d) stop all friction
34. 34.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
35. 35.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Meena (360 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
37. 37.🪝 A bucket weighing 200 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
38. 38.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) both weights are equal (d) the bar is short
39. 39.💪 In a tug of war, one team pulls right with 30 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 8 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet

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