Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 516 · 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 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to look nice (d) to save rubber
3. 3.True or false: pushing a trolley is a push. (a) True (b) False
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a carpet 5 N, sandpaper 6 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
6. 6.⚙️ Which simple machine is the tip of a nail? (a) inclined plane (b) wheel and axle (c) pulley (d) wedge
7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
8. 8.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) make new energy (c) switch off gravity (d) stop all friction
9. 9.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Ravi (380 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
10. 10.⚙️ Which simple machine is a jar lid? (a) lever (b) pulley (c) screw (d) wedge
11. 11.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
12. 12.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a carpet 5 N, sandpaper 6 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
14. 14.💪 A force is a … (a) kind of colour (b) type of sound (c) unit of time (d) push or a pull
15. 15.💪 A box weighs 450 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
16. 16.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 10 (d) 3
17. 17.🏋️ A force of 390 N did 1950 J of work. How many metres did the object move?
18. 18.Which of these is a wheel and axle? (a) an axe blade (b) a seesaw (c) a wheelchair ramp (d) a steering wheel
19. 19.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
20. 20.True or false: a fixed pulley rises with the load. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) powder on a carrom board (b) a tyre with deep treads (c) a wheel on ball bearings (d) skating on ice
22. 22.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the axle (d) the load
23. 23.⚙️ Which simple machine is a steering wheel? (a) pulley (b) screw (c) wheel and axle (d) wedge
24. 24.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
25. 25.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
26. 26.🪝 What does a single fixed pulley change? (a) gravity (b) the size of the load (c) the colour of rope (d) the direction of pull
27. 27.💪 A box weighs 250 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
28. 28.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 2 (c) class 3
29. 29.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) doubled (d) unbalanced
30. 30.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 1 (c) class 3
31. 31.True or false: pressing a doorbell is a push. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a nut and bolt (c) a bottle cap (d) a wood screw
33. 33.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
34. 34.💪 A cart is pulled to the right with 30 N and to the left with 35 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
35. 35.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
36. 36.🔍 Which is the odd one out? (a) a nutcracker (b) a flagpole rope wheel (c) a well-bucket rope wheel (d) a window blind cord
37. 37.🔍 Which is the odd one out? (a) a jar lid (b) a screw jack (c) a nut and bolt (d) a water tap handle
38. 38.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 4 N, a glass sheet 5 N, a carpet 7 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
40. 40.True or false: a well-bucket rope wheel is a wedge. (a) True (b) False

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