Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 386 · 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 smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
2. 2.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Ravi (640 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.⚙️ Which simple machine is a wood screw? (a) pulley (b) screw (c) inclined plane (d) lever
4. 4.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
5. 5.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) far from the fulcrum (c) on the rock (d) on the fulcrum
6. 6.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) make new energy (c) switch off gravity (d) stop all friction
7. 7.🛞 How can we reduce friction in a machine? (a) add sand (b) make parts rough (c) press parts harder (d) oil the moving parts
8. 8.🔍 Which is the odd one out? (a) a crowbar (b) a seesaw (c) a truck loading ramp (d) a claw hammer on a nail
9. 9.🔍 Which is the odd one out? (a) a nut and bolt (b) a well winch handle (c) a round doorknob (d) a water tap handle
10. 10.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 10 (d) 6
11. 11.⚖️ A seesaw balances. Ravi (190 N) sits ? m from the pivot on one side; Kabir (570 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
12. 12.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a wet tiled floor (c) oil on a squeaky hinge (d) a tyre with deep treads
13. 13.🪝 A bucket weighing 180 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
14. 14.🪝 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
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
16. 16.💪 A force is a … (a) kind of colour (b) unit of time (c) type of sound (d) push or a pull
17. 17.Which of these is a wedge? (a) a claw hammer on a nail (b) a nutcracker (c) a well-bucket rope wheel (d) a knife edge
18. 18.Which of these is an inclined plane? (a) a round doorknob (b) an axe blade (c) a crane hook block (d) a wheelchair ramp
19. 19.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
20. 20.🪝 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)
21. 21.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) a box pushed on carpet (d) a wet tiled floor
22. 22.🔍 Which is the odd one out? (a) a steering wheel (b) a claw hammer on a nail (c) a crowbar (d) a nutcracker
23. 23.💪 A bag has a mass of 38 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
24. 24.⚖️ Which class of lever is a bottle opener? (a) class 2 (b) class 3 (c) class 1
25. 25.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Arjun (640 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the effort (d) the fulcrum
28. 28.⚙️ Which simple machine is a nutcracker? (a) lever (b) inclined plane (c) wheel and axle (d) pulley
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
30. 30.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
31. 31.🏋️ Pushing a crate 8 m took 4000 J of work. What force was used, in newtons?
32. 32.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) a bar on a pivot (d) two ramps back to back
33. 33.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
34. 34.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
35. 35.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
36. 36.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
37. 37.💪 In a tug of war, one team pulls right with 60 N and the other pulls left with 25 N. What is the size of the net force, in newtons?
38. 38.⚙️ Which simple machine is a nut and bolt? (a) screw (b) lever (c) wedge (d) inclined plane
39. 39.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
40. 40.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)

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