Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 501 · 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 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
2. 2.⚙️ A screw is really … (a) a kind of wheel (b) a tiny pulley (c) a ramp wrapped round (d) a bent lever
3. 3.True or false: pushing a trolley is a pull. (a) False (b) True
4. 4.🏋️ A force of 230 N did 1610 J of work. How many metres did the object move?
5. 5.⚖️ A seesaw balances. Meena (400 N) sits ? m from the pivot on one side; Zoya (300 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
6. 6.💪 Two children push a box to the right, one with 5 N and the other with 95 N. What is the net (total) force on the box, in newtons?
7. 7.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
8. 8.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
9. 9.⚖️ 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
10. 10.🏋️ Pushing a crate 6 m took 1380 J of work. What force was used, in newtons?
11. 11.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
12. 12.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
13. 13.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
14. 14.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 1 (c) class 2
15. 15.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
16. 16.⚖️ A lever bar balances. The load is 700 N at 30 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?
17. 17.True or false: a tyre with deep treads gives less friction. (a) True (b) False
18. 18.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 60 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
19. 19.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
20. 20.🪝 A pulley system lifts a 960 N load with an effort of 240 N. What is its mechanical advantage (MA)?
21. 21.True or false: a seesaw is a lever. (a) True (b) False
22. 22.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
23. 23.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
24. 24.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
25. 25.True or false: a lemon squeezer is a class 3 lever (effort in the middle). (a) False (b) True
26. 26.🪝 A winch has a wheel of radius 6 cm and an axle of radius 2 cm. What effort on the wheel lifts a 420 N bucket on the axle, in newtons? (ideal)
27. 27.Which of these is caused by magnetic force? (a) an apple falls down (b) a river flows downhill (c) a fridge magnet sticks (d) rain falls to the ground
28. 28.⚖️ A lever bar balances. The load is 120 N at 40 cm from the fulcrum. The effort is 80 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) both weights are equal (d) the bar is short
30. 30.💪 A box weighs 290 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 2 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
32. 32.⚙️ Which simple machine is a nut and bolt? (a) wedge (b) wheel and axle (c) lever (d) screw
33. 33.Which of these is a pulley? (a) a well-bucket rope wheel (b) the tip of a nail (c) a jar lid (d) a claw hammer on a nail
34. 34.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
35. 35.🪝 A bucket weighing 420 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
36. 36.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to look nice (d) to go slower
37. 37.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) chalk on a gym bar (c) a tyre with deep treads (d) a rough doormat
38. 38.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
39. 39.⚖️ A seesaw balances. Ravi (600 N) sits 3 m from the pivot on one side; Arjun (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.💪 A cart is pulled to the right with 45 N and to the left with 60 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force

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