Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 107 · 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 is the odd one out? (a) a wheelchair ramp (b) a truck loading ramp (c) a road up a hill (d) a screw jack
2. 2.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
3. 3.⚙️ Which simple machine is an axe blade? (a) wedge (b) inclined plane (c) pulley (d) lever
4. 4.True or false: a window blind cord is a screw. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a tyre with deep treads (c) a grippy rubber sole (d) skating on ice
6. 6.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
7. 7.⚙️ Which simple machine is a seesaw? (a) lever (b) wheel and axle (c) inclined plane (d) screw
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 0 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
10. 10.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
11. 11.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) use a smaller force (c) switch off gravity (d) make new energy
12. 12.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) a wet tiled floor (d) a rough doormat
13. 13.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
14. 14.💪 In a tug of war, one team pulls left with 10 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
15. 15.⚙️ Which simple machine is a door stopper? (a) wedge (b) lever (c) pulley (d) inclined plane
16. 16.True or false: a movable pulley stays in one place. (a) False (b) True
17. 17.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
18. 18.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 500 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.Which of these is caused by gravity? (a) a fridge magnet sticks (b) a rolling ball slows (c) lifting a school bag (d) a thrown ball comes down
20. 20.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) False (b) True
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 5 N, sandpaper 9 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
22. 22.⚙️ Which simple machine is a crane hook block? (a) wheel and axle (b) pulley (c) wedge (d) screw
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
25. 25.🪝 A pulley system lifts a 210 N load with an effort of 70 N. What is its mechanical advantage (MA)?
26. 26.True or false: chalk on a gym bar gives less friction. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a truck loading ramp (b) a playground slide (c) a road up a hill (d) a chisel
28. 28.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
29. 29.⚖️ A seesaw balances. Meena (160 N) sits ? m from the pivot on one side; Kabir (160 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
30. 30.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to save rubber (d) to look nice
31. 31.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
32. 32.🪝 A pulley system lifts a 200 N load with an effort of 50 N. What is its mechanical advantage (MA)?
33. 33.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) sand on a slippery path (d) oil on a squeaky hinge
34. 34.True or false: a movable pulley halves the effort. (a) True (b) False
35. 35.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
36. 36.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
37. 37.💪 Which force pulls everything towards the Earth? (a) wind (b) gravity (c) friction (d) magnetism
38. 38.⚖️ A seesaw balances. Ravi (440 N) sits ? m from the pivot on one side; Arjun (110 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
39. 39.⚖️ A seesaw balances. Kabir (330 N) sits 3 m from the pivot on one side; Ravi (330 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
40. 40.Which of these is a wedge? (a) the tip of a nail (b) a round doorknob (c) a wood screw (d) a steering wheel

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