Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 565 · 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 360 N did 1080 J of work. How many metres did the object move?
2. 2.🪝 A bucket weighing 30 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
3. 3.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the effort (c) the load (d) the axle
4. 4.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
5. 5.⚖️ A seesaw balances. Meena (400 N) sits 2 m from the pivot on one side; Arjun (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
6. 6.🏋️ A force of 420 N did 2940 J of work. How many metres did the object move?
7. 7.Which of these is an inclined plane? (a) a jar lid (b) a water tap handle (c) a road up a hill (d) a round doorknob
8. 8.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
9. 9.Which of these is caused by gravity? (a) a thrown ball comes down (b) a magnet picks up pins (c) a rolling ball slows (d) brakes stop a bicycle
10. 10.True or false: a movable pulley is on a flagpole top. (a) True (b) False
11. 11.Which of these is a wedge? (a) a knife edge (b) a truck loading ramp (c) a bottle cap (d) a nutcracker
12. 12.⚙️ Which simple machine is a nut and bolt? (a) lever (b) pulley (c) wedge (d) screw
13. 13.True or false: plucking a mango is a pull. (a) False (b) True
14. 14.🏋️ Pushing a crate 5 m took 2100 J of work. What force was used, in newtons?
15. 15.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
16. 16.🪝 A pulley system lifts a 480 N load with an effort of 240 N. What is its mechanical advantage (MA)?
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 5 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
19. 19.🏋️ Pushing a crate 9 m took 3690 J of work. What force was used, in newtons?
20. 20.⚖️ A seesaw balances. Kabir (560 N) sits ? m from the pivot on one side; Arjun (280 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
21. 21.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) closer to the pivot (d) on the pivot
22. 22.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) press parts harder (d) add sand
23. 23.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
24. 24.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Kabir (570 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.⚙️ Which simple machine is a well winch handle? (a) wedge (b) lever (c) inclined plane (d) wheel and axle
26. 26.🪝 What does a single fixed pulley change? (a) the colour of rope (b) gravity (c) the size of the load (d) the direction of pull
27. 27.True or false: a movable pulley rises with the load. (a) False (b) True
28. 28.True or false: a seesaw is a screw. (a) True (b) False
29. 29.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
30. 30.⚖️ A seesaw balances. Asha (520 N) sits 1 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.⚙️ A wedge is … (a) a rope on a wheel (b) a wheel on a rod (c) a bar on a pivot (d) two ramps back to back
32. 32.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a bottle opener (c) a road up a hill (d) a playground slide
33. 33.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
34. 34.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
35. 35.🪝 More rope sections holding a load means … (a) less effort needed (b) more effort needed (c) the load floats (d) no change
36. 36.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
37. 37.🪝 A bucket weighing 200 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
38. 38.Which of these is caused by friction? (a) squeezing a lemon (b) a rolling ball slows (c) an apple falls down (d) a fridge magnet sticks
39. 39.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) gravity (c) balanced (d) unbalanced
40. 40.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a loose rope (c) a smaller rod (axle) (d) a flat ramp

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