Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 626 · 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.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) False (b) True
2. 2.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
3. 3.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
4. 4.⚖️ A lever bar balances. The load is 80 N at 10 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
5. 5.True or false: hitting a cricket ball is a push. (a) True (b) False
6. 6.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
7. 7.🔍 Which is the odd one out? (a) a wet tiled floor (b) a wheel on ball bearings (c) a grippy rubber sole (d) powder on a carrom board
8. 8.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Zoya (120 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.🪝 A bucket weighing 480 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
10. 10.True or false: opening a drawer is a push. (a) True (b) False
11. 11.Which of these is caused by gravity? (a) a compass needle turns (b) rain falls to the ground (c) a magnet picks up pins (d) lifting a school bag
12. 12.💪 A box weighs 460 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
13. 13.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
14. 14.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
16. 16.⚙️ Which simple machine is the tip of a nail? (a) inclined plane (b) screw (c) pulley (d) wedge
17. 17.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
18. 18.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
19. 19.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) farther from the pivot (d) closer to the pivot
20. 20.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) use a smaller force (d) stop all friction
21. 21.True or false: a steering wheel is a screw. (a) False (b) True
22. 22.Which of these is a lever? (a) a crowbar (b) the tip of a nail (c) a well winch handle (d) a round doorknob
23. 23.Which of these is a wheel and axle? (a) a nut and bolt (b) a water tap handle (c) a claw hammer on a nail (d) a seesaw
24. 24.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 3 (c) class 2
25. 25.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
26. 26.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) a rough doormat (d) a wet tiled floor
27. 27.⚖️ A seesaw balances. Zoya (440 N) sits ? m from the pivot on one side; Meena (220 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
28. 28.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
29. 29.💪 Two children push a box to the right, one with 50 N and the other with 80 N. What is the net (total) force on the box, in newtons?
30. 30.True or false: a knife edge is a lever. (a) False (b) True
31. 31.True or false: a movable pulley only changes direction. (a) True (b) False
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, sandpaper 9 N, ice 2 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) ice
33. 33.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
34. 34.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
35. 35.💪 A cart is pulled to the right with 40 N and to the left with 50 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
36. 36.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
37. 37.⚙️ Which simple machine is a steering wheel? (a) screw (b) pulley (c) wedge (d) wheel and axle
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 90 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
39. 39.⚙️ Which simple machine is a truck loading ramp? (a) screw (b) lever (c) inclined plane (d) wheel and axle
40. 40.⚙️ Which simple machine is a wheelchair ramp? (a) screw (b) wedge (c) inclined plane (d) lever

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