Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 22 · 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 movable pulley only changes direction. (a) True (b) False
2. 2.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 300 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
4. 4.💪 A bag has a mass of 38 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
5. 5.⚖️ Turning effect = force × … (a) time taken (b) distance from fulcrum (c) colour of bar (d) mass of fulcrum
6. 6.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Meena (300 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
7. 7.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 390 N bucket on the axle, in newtons? (ideal)
9. 9.⚙️ Which simple machine is a wheelchair ramp? (a) lever (b) screw (c) inclined plane (d) wedge
10. 10.💪 In a tug of war, one team pulls right with 40 N and the other pulls left with 30 N. What is the size of the net force, in newtons?
11. 11.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
12. 12.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
13. 13.Which of these is an inclined plane? (a) a window blind cord (b) a wheelchair ramp (c) a bottle cap (d) a wood screw
14. 14.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
15. 15.🔍 Which is the odd one out? (a) a well winch handle (b) a water tap handle (c) a seesaw (d) a steering wheel
16. 16.True or false: a round doorknob is a wheel and axle. (a) False (b) True
17. 17.💪 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 right (b) no net force (c) to the left
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 3 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
19. 19.⚖️ A lever bar balances. The load is 200 N at 20 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.Which of these is an inclined plane? (a) a window blind cord (b) a crowbar (c) a crane hook block (d) a truck loading ramp
21. 21.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed
22. 22.🔍 Which is the odd one out? (a) a round doorknob (b) a water tap handle (c) a jar lid (d) a well winch handle
23. 23.💪 A cart is pulled to the right with 30 N and to the left with 25 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
24. 24.⚖️ A seesaw balances. Asha (400 N) sits ? m from the pivot on one side; Meena (200 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
25. 25.💪 Which force is at work: an apple falls down? (a) friction (b) muscular force (c) magnetic force (d) gravity
26. 26.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
29. 29.True or false: a water tap handle is a screw. (a) False (b) True
30. 30.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a smaller rod (axle) (c) a loose rope (d) a flat ramp
31. 31.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
32. 32.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
33. 33.⚙️ Which simple machine is a crowbar? (a) lever (b) wheel and axle (c) wedge (d) inclined plane
34. 34.🔍 Which is the odd one out? (a) a steering wheel (b) a crane hook block (c) a window blind cord (d) a flagpole rope wheel
35. 35.Which of these is a screw? (a) a round doorknob (b) a bottle cap (c) a claw hammer on a nail (d) a crowbar
36. 36.🏋️ A force of 150 N did 300 J of work. How many metres did the object move?
37. 37.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
38. 38.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
39. 39.True or false: a pair of tweezers is a class 1 lever (fulcrum in the middle). (a) False (b) True
40. 40.🪝 A pulley system lifts a 390 N load with an effort of 130 N. What is its mechanical advantage (MA)?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids