Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 100 · 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 490 N pushes a cart 6 m along the floor. How much work is done, in joules?
2. 2.🔍 Which is the odd one out? (a) a window blind cord (b) a flagpole rope wheel (c) a steering wheel (d) a well-bucket rope wheel
3. 3.⚖️ A lever bar balances. The load is 50 N at 50 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
4. 4.🪝 A bucket weighing 170 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
5. 5.True or false: sand on a slippery path gives less friction. (a) True (b) False
6. 6.⚖️ A seesaw balances. Kabir (480 N) sits ? m from the pivot on one side; Meena (320 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
7. 7.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
8. 8.True or false: a road up a hill is an inclined plane. (a) False (b) True
9. 9.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the pulley (c) the effort (d) the fulcrum
10. 10.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) a grippy rubber sole (d) skating on ice
11. 11.🪝 A winch has a wheel of radius 21 cm and an axle of radius 3 cm. What effort on the wheel lifts a 560 N bucket on the axle, in newtons? (ideal)
12. 12.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
13. 13.⚖️ A seesaw balances. Arjun (340 N) sits 4 m from the pivot on one side; Ravi (680 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
14. 14.🔍 Which is the odd one out? (a) a well winch handle (b) a water tap handle (c) a wood screw (d) a round doorknob
15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
17. 17.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 1 (c) class 2
18. 18.⚙️ Which simple machine is a round doorknob? (a) pulley (b) inclined plane (c) screw (d) wheel and axle
19. 19.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
20. 20.Which of these is a wedge? (a) a window blind cord (b) a well-bucket rope wheel (c) a nut and bolt (d) a knife edge
21. 21.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
22. 22.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 2 (c) class 1
23. 23.💪 In a tug of war, one team pulls right with 10 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
24. 24.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber
25. 25.🏋️ A force of 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
27. 27.⚖️ A seesaw balances. Zoya (280 N) sits 4 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?
28. 28.💪 A bag has a mass of 6 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
29. 29.True or false: a tug of war is a push. (a) True (b) False
30. 30.True or false: plucking a mango is a pull. (a) True (b) False
31. 31.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) doubled (c) unbalanced (d) gravity
32. 32.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
33. 33.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
34. 34.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 2 (c) class 3
35. 35.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
36. 36.💪 A box weighs 90 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
37. 37.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
39. 39.Which of these is caused by friction? (a) a fridge magnet sticks (b) a thrown ball comes down (c) a river flows downhill (d) brakes stop a bicycle
40. 40.💪 Which force is at work: shoes grip the floor? (a) muscular force (b) friction (c) magnetic force (d) gravity

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