Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 70 · 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 bucket weighing 480 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.🔍 Which is the odd one out? (a) a road up a hill (b) a playground slide (c) a round doorknob (d) a truck loading ramp
3. 3.🪝 A pulley system lifts an 840 N load with an effort of 280 N. What is its mechanical advantage (MA)?
4. 4.True or false: a box pushed on carpet gives less friction. (a) False (b) True
5. 5.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
6. 6.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
7. 7.⚖️ A seesaw balances. Meena (680 N) sits 4 m from the pivot on one side; Arjun (680 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) skating on ice (d) chalk on a gym bar
9. 9.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) friction (c) magnetic force (d) gravity
10. 10.True or false: a bottle opener is a class 3 lever (effort in the middle). (a) False (b) True
11. 11.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) True (b) False
12. 12.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 20 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 11 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
14. 14.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, ice 2 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
16. 16.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
17. 17.Which of these is a wedge? (a) a door stopper (b) a nut and bolt (c) a nutcracker (d) a truck loading ramp
18. 18.🔍 Which is the odd one out? (a) a seesaw (b) the tip of a nail (c) a nutcracker (d) a claw hammer on a nail
19. 19.True or false: a window blind cord is a wedge. (a) False (b) True
20. 20.🏋️ A force of 450 N did 450 J of work. How many metres did the object move?
21. 21.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to look nice (d) to grip the road
22. 22.True or false: a door stopper is a wheel and axle. (a) False (b) True
23. 23.Which of these is caused by friction? (a) a magnet picks up pins (b) shoes grip the floor (c) a river flows downhill (d) an apple falls down
24. 24.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
25. 25.🔍 Which is the odd one out? (a) a water tap handle (b) a seesaw (c) a nutcracker (d) a crowbar
26. 26.💪 Two children push a box to the right, one with 85 N and the other with 15 N. What is the net (total) force on the box, in newtons?
27. 27.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 2 (c) class 1
28. 28.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
29. 29.🪝 A bucket weighing 160 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 3 (c) class 2
31. 31.True or false: a fixed pulley needs effort = load. (a) True (b) False
32. 32.💪 A force is a … (a) unit of time (b) push or a pull (c) type of sound (d) kind of colour
33. 33.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
35. 35.⚖️ A seesaw balances. Asha (540 N) sits 3 m from the pivot on one side; Meena (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.🏋️ A force of 480 N pushes a cart 5 m along the floor. How much work is done, in joules?
37. 37.💪 Which force is at work: a thrown ball comes down? (a) friction (b) muscular force (c) gravity (d) magnetic force
38. 38.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 100 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
39. 39.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 90 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 80 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1

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