Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 265 · 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 load of 1120 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
2. 2.💪 Two children push a box to the right, one with 70 N and the other with 20 N. What is the net (total) force on the box, in newtons?
3. 3.🪝 A bucket weighing 310 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
4. 4.🪝 A bucket weighing 410 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
5. 5.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the direction of pull (d) the colour of rope
6. 6.🪝 A pulley system lifts a 360 N load with an effort of 180 N. What is its mechanical advantage (MA)?
7. 7.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Kabir (110 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
8. 8.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
9. 9.💪 A force is a … (a) push or a pull (b) type of sound (c) unit of time (d) kind of colour
10. 10.🪝 A load of 320 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
11. 11.🪝 A load of 240 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
12. 12.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
13. 13.🪝 More rope sections holding a load means … (a) the load floats (b) more effort needed (c) less effort needed (d) no change
14. 14.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
15. 15.Which of these is a lever? (a) a playground slide (b) a knife edge (c) a water tap handle (d) a crowbar
16. 16.🔍 Which is the odd one out? (a) a wet tiled floor (b) a tyre with deep treads (c) a wheel on ball bearings (d) oil on a squeaky hinge
17. 17.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
19. 19.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
20. 20.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber
21. 21.⚖️ A seesaw balances. Zoya (340 N) sits ? m from the pivot on one side; Asha (170 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
22. 22.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
23. 23.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
24. 24.Which of these is a wheel and axle? (a) a knife edge (b) an axe blade (c) a round doorknob (d) a door stopper
25. 25.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
26. 26.💪 A box weighs 170 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
27. 27.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 1 (c) class 3
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 9 N, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
29. 29.⚖️ A seesaw balances. Ravi (680 N) sits ? m from the pivot on one side; Zoya (170 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
30. 30.🪝 A pulley system lifts a 600 N load with an effort of 300 N. What is its mechanical advantage (MA)?
31. 31.🪝 A pulley system lifts a 120 N load with an effort of 40 N. What is its mechanical advantage (MA)?
32. 32.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) closer to the pivot (d) on the pivot
33. 33.🛞 Friction acts … (a) only on ice (b) against the motion (c) only upwards (d) with the motion
34. 34.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
35. 35.⚖️ A lever bar balances. The load is 900 N at ? cm from the fulcrum. The effort is 400 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.Which of these is caused by muscular force? (a) shoes grip the floor (b) a fridge magnet sticks (c) squeezing a lemon (d) a magnet picks up pins
37. 37.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
38. 38.True or false: a wet tiled floor gives less friction. (a) True (b) False
39. 39.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
40. 40.🪝 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)

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