Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 707 · 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.True or false: a movable pulley needs effort = load. (a) False (b) True
2. 2.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
3. 3.True or false: a fixed pulley only changes direction. (a) True (b) False
4. 4.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
5. 5.True or false: pulling up your socks is a pull. (a) False (b) True
6. 6.True or false: a fixed pulley stays in one place. (a) False (b) True
7. 7.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
8. 8.🪝 More rope sections holding a load means … (a) more effort needed (b) less effort needed (c) the load floats (d) no change
9. 9.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
10. 10.Which of these is caused by friction? (a) an apple falls down (b) a compass needle turns (c) rubbing hands warms them (d) a magnet picks up pins
11. 11.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 90 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
13. 13.💪 Which can a force NOT do? (a) change its shape (b) stop it moving (c) start it moving (d) change its colour
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 4 N, sandpaper 6 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
15. 15.💪 Which force pulls everything towards the Earth? (a) friction (b) magnetism (c) gravity (d) wind
16. 16.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) turning effects match (d) the bar is short
17. 17.🪝 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
18. 18.⚙️ Which simple machine is the tip of a nail? (a) wedge (b) inclined plane (c) lever (d) wheel and axle
19. 19.💪 Two children push a box to the right, one with 20 N and the other with 70 N. What is the net (total) force on the box, in newtons?
20. 20.🪝 A bucket weighing 450 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.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
22. 22.🪝 A well winch has a handle (wheel) of radius 32 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
23. 23.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
24. 24.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
25. 25.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) far from the fulcrum (b) on the rock (c) near the fulcrum (d) on the fulcrum
26. 26.True or false: pushing a swing is a push. (a) True (b) False
27. 27.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
28. 28.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
29. 29.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
30. 30.⚖️ Which class of lever is a bottle opener? (a) class 1 (b) class 3 (c) class 2
31. 31.⚙️ Which simple machine is a claw hammer on a nail? (a) lever (b) screw (c) wedge (d) wheel and axle
32. 32.💪 A cart is pulled to the right with 80 N and to the left with 95 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
33. 33.Which of these is a lever? (a) a wood screw (b) a crowbar (c) a well-bucket rope wheel (d) a water tap handle
34. 34.True or false: hitting a cricket ball is a push. (a) False (b) True
35. 35.⚖️ A seesaw balances. Meena (680 N) sits 2 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.🏋️ Pushing a crate 2 m took 940 J of work. What force was used, in newtons?
37. 37.💪 Which force is at work: a magnet picks up pins? (a) gravity (b) muscular force (c) friction (d) magnetic force
38. 38.Which of these is a lever? (a) a bottle opener (b) a round doorknob (c) a chisel (d) a bottle cap
39. 39.True or false: kicking a football is a pull. (a) True (b) False
40. 40.⚖️ A lever bar balances. The load is 160 N at 50 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?

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