Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 407 · 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 machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
2. 2.💪 Two children push a box to the right, one with 35 N and the other with 5 N. What is the net (total) force on the box, in newtons?
3. 3.Which of these is a pulley? (a) a round doorknob (b) a wood screw (c) a truck loading ramp (d) a window blind cord
4. 4.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
5. 5.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 2 N, a wooden plank 6 N, a carpet 9 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
7. 7.🪝 More rope sections holding a load means … (a) the load floats (b) no change (c) less effort needed (d) more effort needed
8. 8.💪 A force is a … (a) type of sound (b) unit of time (c) push or a pull (d) kind of colour
9. 9.⚖️ A lever bar balances. The load is 450 N at 40 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.Which of these is a wedge? (a) a claw hammer on a nail (b) a nutcracker (c) a truck loading ramp (d) a door stopper
11. 11.🔍 Which is the odd one out? (a) a nut and bolt (b) a knife edge (c) a bottle cap (d) a wood screw
12. 12.🔍 Which is the odd one out? (a) a water tap handle (b) a steering wheel (c) a screw jack (d) a round doorknob
13. 13.⚖️ A seesaw balances. Kabir (180 N) sits ? m from the pivot on one side; Meena (180 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
14. 14.💪 A box weighs 590 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
15. 15.🪝 A pulley system lifts a 260 N load with an effort of 130 N. What is its mechanical advantage (MA)?
16. 16.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 2 N, a wooden plank 6 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) sandpaper
18. 18.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
19. 19.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
20. 20.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Meena (200 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a road up a hill (c) a nutcracker (d) a truck loading ramp
23. 23.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
24. 24.⚖️ A seesaw balances. Meena (440 N) sits 3 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🏋️ A force of 190 N did 1900 J of work. How many metres did the object move?
26. 26.🪝 A winch has a wheel of radius 35 cm and an axle of radius 5 cm. What effort on the wheel lifts a 420 N bucket on the axle, in newtons? (ideal)
27. 27.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
28. 28.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a bent lever (d) a ramp wrapped round
29. 29.True or false: chalk on a gym bar gives less friction. (a) True (b) False
30. 30.True or false: a well-bucket rope wheel is a pulley. (a) False (b) True
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, a glass sheet 2 N, a wooden plank 3 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
32. 32.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) a smooth steel slide (d) a wheel on ball bearings
33. 33.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
34. 34.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 250 N bucket on the axle, in newtons? (ideal)
35. 35.True or false: pushing a swing is a pull. (a) False (b) True
36. 36.True or false: a smooth steel slide gives less friction. (a) True (b) False
37. 37.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
39. 39.Which of these is a lever? (a) a seesaw (b) a well-bucket rope wheel (c) a screw jack (d) a playground slide
40. 40.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) the colour of rope (d) gravity

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