Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 975 · 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 pulley system lifts a 570 N load with an effort of 190 N. What is its mechanical advantage (MA)?
2. 2.True or false: a movable pulley only changes direction. (a) True (b) False
3. 3.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
4. 4.🏋️ A force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
5. 5.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) polished marble (c) ice (d) glass
6. 6.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
7. 7.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) gravity (d) the direction of pull
8. 8.🏋️ Pushing a crate 7 m took 1470 J of work. What force was used, in newtons?
9. 9.⚖️ 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 1 (c) class 2
10. 10.True or false: hitting a cricket ball is a push. (a) True (b) False
11. 11.💪 A box weighs 410 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
12. 12.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the effort (c) the axle (d) the fulcrum
13. 13.True or false: plucking a mango is a pull. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) a screw jack (b) a jar lid (c) a nut and bolt (d) the tip of a nail
15. 15.⚖️ A lever bar balances. The load is 350 N at 40 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.⚙️ Which simple machine is a claw hammer on a nail? (a) wheel and axle (b) wedge (c) lever (d) pulley
17. 17.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
18. 18.💪 A bag has a mass of 2 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
19. 19.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 60 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 10 N, ice 2 N. How many newtons more were needed on a carpet than on ice?
21. 21.True or false: a grippy rubber sole gives more friction. (a) True (b) False
22. 22.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
23. 23.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
24. 24.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
25. 25.💪 Which force is at work: pedalling a cycle? (a) muscular force (b) magnetic force (c) friction (d) gravity
26. 26.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 2 (c) class 1
27. 27.Which of these is a lever? (a) a door stopper (b) a flagpole rope wheel (c) a wood screw (d) a seesaw
28. 28.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
29. 29.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 3 (c) class 2
30. 30.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) less effort needed (d) the load floats
31. 31.💪 Two children push a box to the right, one with 25 N and the other with 85 N. What is the net (total) force on the box, in newtons?
32. 32.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
33. 33.💪 A bag has a mass of 58 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
34. 34.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a smaller rod (axle) (d) a flat ramp
35. 35.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 10 (c) 3 (d) 12
36. 36.💪 In a tug of war, one team pulls left with 15 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
37. 37.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
38. 38.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) turning effects match (d) both weights are equal
39. 39.True or false: a steering wheel is a wheel and axle. (a) True (b) False
40. 40.Which of these is a screw? (a) a steering wheel (b) a window blind cord (c) a crowbar (d) a nut and bolt

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