Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 197 · 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 force of 380 N did 380 J of work. How many metres did the object move?
2. 2.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
3. 3.True or false: pulling a cart is a push. (a) True (b) False
4. 4.💪 Two children push a box to the right, one with 15 N and the other with 100 N. What is the net (total) force on the box, in newtons?
5. 5.⚖️ A seesaw balances. Meena (140 N) sits 4 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🔍 Which is the odd one out? (a) a knife edge (b) the tip of a nail (c) a well winch handle (d) a chisel
7. 7.True or false: a grippy rubber sole gives less friction. (a) False (b) True
8. 8.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 6 (c) 12 (d) 10
9. 9.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wheel on ball bearings (c) a smooth steel slide (d) skating on ice
10. 10.True or false: a broom when sweeping is a class 1 lever (fulcrum in the middle). (a) True (b) False
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a carpet 8 N, sandpaper 11 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
12. 12.🏋️ Pushing a crate 5 m took 200 J of work. What force was used, in newtons?
13. 13.True or false: kicking a football is a pull. (a) False (b) True
14. 14.🏋️ A force of 110 N pushes a cart 8 m along the floor. How much work is done, in joules?
15. 15.True or false: sand on a slippery path gives less friction. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) skating on ice (d) chalk on a gym bar
17. 17.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 3 (c) class 2
18. 18.💪 Which can a force NOT do? (a) stop it moving (b) change its colour (c) start it moving (d) change its shape
19. 19.True or false: pulling up your socks is a pull. (a) False (b) True
20. 20.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
21. 21.🪝 A bucket weighing 110 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
22. 22.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) gravity (d) the direction of pull
23. 23.⚖️ A lever bar balances. The load is 630 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?
24. 24.🪝 A winch has a wheel of radius 12 cm and an axle of radius 3 cm. What effort on the wheel lifts a 120 N bucket on the axle, in newtons? (ideal)
25. 25.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) warm (d) wet
26. 26.🔍 Which is the odd one out? (a) a road up a hill (b) an axe blade (c) a playground slide (d) a truck loading ramp
27. 27.Which of these is a wedge? (a) a bottle opener (b) a water tap handle (c) a door stopper (d) a nutcracker
28. 28.💪 A box weighs 410 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
29. 29.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
30. 30.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
31. 31.🪝 A winch has a wheel of radius 30 cm and an axle of radius 5 cm. What effort on the wheel lifts an 840 N bucket on the axle, in newtons? (ideal)
32. 32.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.🔍 Which is the odd one out? (a) the tip of a nail (b) a door stopper (c) a knife edge (d) a bottle opener
34. 34.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 1 (c) class 2
35. 35.True or false: a movable pulley halves the effort. (a) False (b) True
36. 36.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) use a smaller force (c) stop all friction (d) make new energy
37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
39. 39.⚖️ A seesaw balances. Asha (340 N) sits 1 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?

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