Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 189 · 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.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
2. 2.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) True (b) False
3. 3.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
4. 4.True or false: a movable pulley needs effort = load. (a) False (b) True
5. 5.💪 Which can a force NOT do? (a) change its shape (b) stop it moving (c) start it moving (d) change its colour
6. 6.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) closer to the pivot (d) farther from the pivot
7. 7.⚙️ A wedge is … (a) a bar on a pivot (b) two ramps back to back (c) a wheel on a rod (d) a rope on a wheel
8. 8.🪝 More rope sections holding a load means … (a) the load floats (b) more effort needed (c) less effort needed (d) no change
9. 9.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
10. 10.🪝 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
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 5 N, a carpet 8 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) ice (d) a carpet
12. 12.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
13. 13.True or false: a wood screw is an inclined plane. (a) False (b) True
14. 14.💪 A cart is pulled to the right with 30 N and to the left with 30 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
15. 15.🏋️ Pushing a crate 7 m took 1260 J of work. What force was used, in newtons?
16. 16.⚖️ A seesaw balances. Arjun (? N) sits 2 m from the pivot on one side; Meena (400 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 10 N, ice 4 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
18. 18.⚖️ Turning effect = force × … (a) distance from fulcrum (b) time taken (c) mass of fulcrum (d) colour of bar
19. 19.Which of these is a wheel and axle? (a) a road up a hill (b) a seesaw (c) a bottle opener (d) a round doorknob
20. 20.🪝 A pulley system lifts a 630 N load with an effort of 210 N. What is its mechanical advantage (MA)?
21. 21.Which of these is a wheel and axle? (a) a claw hammer on a nail (b) a screw jack (c) a well winch handle (d) a truck loading ramp
22. 22.True or false: kicking a football is a pull. (a) False (b) True
23. 23.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
24. 24.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
25. 25.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
26. 26.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
27. 27.True or false: a round doorknob is a lever. (a) False (b) True
28. 28.⚙️ Which simple machine is a wheelchair ramp? (a) pulley (b) lever (c) wheel and axle (d) inclined plane
29. 29.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
30. 30.⚙️ Which simple machine is a water tap handle? (a) inclined plane (b) wheel and axle (c) lever (d) pulley
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a wooden plank 10 N, a carpet 14 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 4 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
33. 33.💪 A cart is pulled to the right with 65 N and to the left with 80 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
34. 34.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
35. 35.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
36. 36.⚙️ Which simple machine is a nut and bolt? (a) screw (b) lever (c) pulley (d) wedge
37. 37.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a wooden plank 8 N, a carpet 9 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
39. 39.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
40. 40.🔍 Which is the odd one out? (a) a smooth steel slide (b) a grippy rubber sole (c) a wheel on ball bearings (d) oil on a squeaky hinge

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