Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 550 · 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 680 N when you push with 170 N. What is its mechanical advantage (MA)?
2. 2.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
3. 3.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
4. 4.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) add sand (d) oil the moving parts
5. 5.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
6. 6.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 12 N, ice 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
8. 8.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
9. 9.💪 Which force pulls everything towards the Earth? (a) gravity (b) magnetism (c) friction (d) wind
10. 10.🏋️ A force of 370 N did 3330 J of work. How many metres did the object move?
11. 11.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
12. 12.⚖️ A lever bar balances. The load is 600 N at 30 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.Which of these is a screw? (a) a crane hook block (b) a well winch handle (c) a seesaw (d) a nut and bolt
14. 14.🪝 More rope sections holding a load means … (a) no change (b) less effort needed (c) the load floats (d) more effort needed
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 7 N, a carpet 8 N, ice 3 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
16. 16.💪 A box weighs 440 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
17. 17.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a rough doormat (c) skating on ice (d) a smooth steel slide
18. 18.🏋️ A force of 260 N did 1820 J of work. How many metres did the object move?
19. 19.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
20. 20.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) True (b) False
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a wooden plank 6 N, sandpaper 9 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) ice
22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
23. 23.💪 Is pushing a swing a push or a pull? (a) a push (b) a pull
24. 24.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
25. 25.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
26. 26.🛞 Why are tyres made with deep treads? (a) to look nice (b) to save rubber (c) to grip the road (d) to go slower
27. 27.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Meena (240 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.🔍 Which is the odd one out? (a) a wet tiled floor (b) a grippy rubber sole (c) chalk on a gym bar (d) a box pushed on carpet
29. 29.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
30. 30.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 1 (c) class 2
31. 31.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
32. 32.Which of these is a lever? (a) a bottle opener (b) a round doorknob (c) an axe blade (d) the tip of a nail
33. 33.⚖️ A lever bar balances. The load is 600 N at 40 cm from the fulcrum. The effort is 240 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.⚙️ Which simple machine is a wood screw? (a) wedge (b) inclined plane (c) screw (d) pulley
35. 35.⚖️ A lever bar balances. The load is 200 N at ? cm from the fulcrum. The effort is 40 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
37. 37.Which of these is a screw? (a) a crowbar (b) a wood screw (c) a flagpole rope wheel (d) a chisel
38. 38.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 9 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
40. 40.💪 Which force is at work: an apple falls down? (a) gravity (b) muscular force (c) magnetic force (d) friction

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