Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 513 · 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.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
2. 2.💪 Which force is at work: brakes stop a bicycle? (a) gravity (b) muscular force (c) magnetic force (d) friction
3. 3.🔍 Which is the odd one out? (a) a well winch handle (b) a round doorknob (c) a wheelchair ramp (d) a steering wheel
4. 4.True or false: a nut and bolt is a screw. (a) True (b) False
5. 5.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
6. 6.True or false: the tip of a nail is a wedge. (a) True (b) False
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a wooden plank 4 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
8. 8.🏋️ A force of 310 N did 2790 J of work. How many metres did the object move?
9. 9.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
10. 10.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the fulcrum moves (d) the bar is short
11. 11.⚖️ A lever bar balances. The load is 540 N at 50 cm from the fulcrum. The effort is 450 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
12. 12.True or false: a fixed pulley halves the effort. (a) True (b) False
13. 13.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
14. 14.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a grippy rubber sole (c) powder on a carrom board (d) skating on ice
15. 15.Which of these is a pulley? (a) a bottle cap (b) a wood screw (c) a round doorknob (d) a flagpole rope wheel
16. 16.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) switch off gravity (c) stop all friction (d) make new energy
17. 17.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
18. 18.Which of these is a wheel and axle? (a) a crane hook block (b) a knife edge (c) a crowbar (d) a well winch handle
19. 19.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Zoya (200 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.True or false: a jar lid is a screw. (a) False (b) True
21. 21.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) nothing
22. 22.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
23. 23.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
24. 24.🏋️ A force of 340 N pushes a cart 6 m along the floor. How much work is done, in joules?
25. 25.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
26. 26.🏋️ Pushing a crate 6 m took 2220 J of work. What force was used, in newtons?
27. 27.🔍 Which is the odd one out? (a) the tip of a nail (b) a crane hook block (c) a well-bucket rope wheel (d) a flagpole rope wheel
28. 28.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
29. 29.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a window blind cord (c) a flagpole rope wheel (d) a well winch handle
30. 30.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
32. 32.⚙️ Which simple machine is a flagpole rope wheel? (a) inclined plane (b) pulley (c) wheel and axle (d) screw
33. 33.True or false: the tip of a nail is a screw. (a) True (b) False
34. 34.True or false: pulling up your socks is a pull. (a) False (b) True
35. 35.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 60 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.🪝 A winch has a wheel of radius 25 cm and an axle of radius 5 cm. What effort on the wheel lifts a 150 N bucket on the axle, in newtons? (ideal)
37. 37.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 3 (c) class 2
38. 38.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
39. 39.💪 A cart is pulled to the right with 40 N and to the left with 50 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
40. 40.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it

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