Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 66 · 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.⚙️ Which simple machine is a knife edge? (a) wedge (b) wheel and axle (c) inclined plane (d) screw
2. 2.💪 A bag has a mass of 29 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
3. 3.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
4. 4.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 3 (c) class 1
5. 5.⚙️ Which simple machine is a claw hammer on a nail? (a) wheel and axle (b) screw (c) wedge (d) lever
6. 6.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
7. 7.⚖️ A seesaw balances. Meena (800 N) sits 2 m from the pivot on one side; Zoya (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.⚖️ A seesaw balances. Asha (640 N) sits 3 m from the pivot on one side; Meena (480 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
9. 9.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 2 N, a glass sheet 6 N, a wooden plank 7 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
11. 11.🪝 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?
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
13. 13.Which of these is a lever? (a) a truck loading ramp (b) a crowbar (c) a jar lid (d) the tip of a nail
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N, sandpaper 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
15. 15.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
16. 16.💪 A cart is pulled to the right with 35 N and to the left with 30 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
17. 17.💪 Which force is at work: pedalling a cycle? (a) magnetic force (b) muscular force (c) gravity (d) friction
18. 18.Which of these is an inclined plane? (a) a wheelchair ramp (b) a door stopper (c) a steering wheel (d) a nut and bolt
19. 19.🔍 Which is the odd one out? (a) a chisel (b) a knife edge (c) an axe blade (d) a flagpole rope wheel
20. 20.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
21. 21.⚖️ A seesaw balances. Zoya (360 N) sits 1 m from the pivot on one side; Arjun (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
23. 23.🔍 Which is the odd one out? (a) an axe blade (b) the tip of a nail (c) a door stopper (d) a truck loading ramp
24. 24.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
25. 25.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
27. 27.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
28. 28.⚖️ A seesaw balances. Asha (360 N) sits ? m from the pivot on one side; Ravi (480 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
29. 29.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
30. 30.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a wooden plank 8 N, sandpaper 11 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
32. 32.🛞 Friction acts … (a) with the motion (b) against the motion (c) only on ice (d) only upwards
33. 33.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
34. 34.True or false: a tug of war is a pull. (a) True (b) False
35. 35.Which of these is a pulley? (a) a knife edge (b) a bottle opener (c) a well winch handle (d) a window blind cord
36. 36.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 12 (c) 3 (d) 6
37. 37.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
38. 38.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
39. 39.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
40. 40.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2

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