Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 314 · 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) both weights are equal (b) the bar is short (c) the fulcrum moves (d) turning effects match
2. 2.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1
3. 3.🔍 Which is the odd one out? (a) powder on a carrom board (b) a box pushed on carpet (c) a rough doormat (d) a grippy rubber sole
4. 4.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
5. 5.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 120 N bucket on the axle, in newtons? (ideal)
6. 6.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
7. 7.Which of these is caused by magnetic force? (a) pedalling a cycle (b) a river flows downhill (c) a fridge magnet sticks (d) a rolling ball slows
8. 8.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
9. 9.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Meena (480 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
10. 10.💪 In which unit do we measure force? (a) second (s) (b) litre (L) (c) metre (m) (d) newton (N)
11. 11.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 0 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
13. 13.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a rough doormat (d) oil on a squeaky hinge
14. 14.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 2 (c) class 1
15. 15.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 3 (c) class 1
16. 16.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
17. 17.⚙️ Which simple machine is a truck loading ramp? (a) wedge (b) lever (c) inclined plane (d) wheel and axle
18. 18.🪝 A pulley system lifts a 600 N load with an effort of 150 N. What is its mechanical advantage (MA)?
19. 19.💪 Two children push a box to the right, one with 55 N and the other with 50 N. What is the net (total) force on the box, in newtons?
20. 20.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
21. 21.🔍 Which is the odd one out? (a) a jar lid (b) a round doorknob (c) a wood screw (d) a nut and bolt
22. 22.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
23. 23.🔍 Which is the odd one out? (a) a well winch handle (b) a water tap handle (c) a round doorknob (d) a bottle cap
24. 24.💪 A force is a … (a) push or a pull (b) unit of time (c) kind of colour (d) type of sound
25. 25.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) far from the fulcrum (d) on the fulcrum
26. 26.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
27. 27.True or false: a flagpole rope wheel is a pulley. (a) False (b) True
28. 28.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
29. 29.True or false: a tyre with deep treads gives more friction. (a) True (b) False
30. 30.⚖️ A seesaw balances. Asha (180 N) sits 1 m from the pivot on one side; Meena (180 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
31. 31.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
32. 32.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
35. 35.💪 In a tug of war, one team pulls right with 50 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
36. 36.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
37. 37.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
38. 38.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) squeezing a lemon (c) rubbing hands warms them (d) shoes grip the floor
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
40. 40.Which of these is caused by gravity? (a) a compass needle turns (b) a rolling ball slows (c) lifting a school bag (d) rain falls to the ground

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