Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 432 · 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 lever balances when … (a) the fulcrum moves (b) turning effects match (c) the bar is short (d) both weights are equal
2. 2.🏋️ A force of 240 N did 960 J of work. How many metres did the object move?
3. 3.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the pulley (d) the load
4. 4.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a road up a hill (c) a nutcracker (d) a playground slide
5. 5.True or false: a knife edge is an inclined plane. (a) False (b) True
6. 6.Which of these is a screw? (a) a nut and bolt (b) a claw hammer on a nail (c) a nutcracker (d) a well-bucket rope wheel
7. 7.⚖️ A seesaw balances. Kabir (360 N) sits 2 m from the pivot on one side; Ravi (360 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
8. 8.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
9. 9.💪 In a tug of war, one team pulls right with 25 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
10. 10.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
11. 11.True or false: a tyre with deep treads gives less friction. (a) True (b) False
12. 12.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
13. 13.True or false: a tyre with deep treads gives more friction. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) a water tap handle (b) a well winch handle (c) a round doorknob (d) a nut and bolt
15. 15.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
16. 16.🏋️ A force of 500 N pushes a cart 9 m along the floor. How much work is done, in joules?
17. 17.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
18. 18.🪝 A bucket weighing 270 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
19. 19.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
20. 20.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
22. 22.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) True (b) False
23. 23.⚙️ Which simple machine is a road up a hill? (a) lever (b) wedge (c) inclined plane (d) wheel and axle
24. 24.⚖️ What is the pivot point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
25. 25.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
26. 26.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
27. 27.Which of these is a pulley? (a) a nut and bolt (b) a crane hook block (c) a bottle cap (d) a road up a hill
28. 28.⚖️ A seesaw balances. Asha (520 N) sits 2 m from the pivot on one side; Ravi (260 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 0 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
30. 30.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
31. 31.True or false: hitting a cricket ball is a push. (a) False (b) True
32. 32.🪝 A pulley system lifts an 870 N load with an effort of 290 N. What is its mechanical advantage (MA)?
33. 33.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 6 (d) 12
34. 34.💪 Two children push a box to the right, one with 70 N and the other with 35 N. What is the net (total) force on the box, in newtons?
35. 35.💪 Which force pulls everything towards the Earth? (a) friction (b) magnetism (c) wind (d) gravity
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
37. 37.⚙️ Which simple machine is a knife edge? (a) screw (b) wedge (c) lever (d) wheel and axle
38. 38.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
39. 39.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Meena (140 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley

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