Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 871 · 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: closing a drawer is a push. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) sand on a slippery path (c) a box pushed on carpet (d) a grippy rubber sole
3. 3.⚙️ Which simple machine is a jar lid? (a) inclined plane (b) pulley (c) lever (d) screw
4. 4.True or false: pressing a doorbell is a push. (a) False (b) True
5. 5.🪝 What does a single fixed pulley change? (a) the colour of rope (b) gravity (c) the direction of pull (d) the size of the load
6. 6.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.🪝 A bucket weighing 220 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
8. 8.⚖️ A seesaw balances. Zoya (200 N) sits ? m from the pivot on one side; Kabir (600 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
9. 9.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) the load floats (d) less effort needed
10. 10.⚙️ Which simple machine is a steering wheel? (a) inclined plane (b) wedge (c) wheel and axle (d) screw
11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
12. 12.⚖️ A lever bar balances. The load is 60 N at 20 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
13. 13.⚖️ A seesaw balances. Ravi (800 N) sits 3 m from the pivot on one side; Meena (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
14. 14.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
15. 15.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
16. 16.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
17. 17.Which of these is caused by magnetic force? (a) brakes stop a bicycle (b) a rolling ball slows (c) shoes grip the floor (d) a fridge magnet sticks
18. 18.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
19. 19.True or false: a beam balance is a class 2 lever (load in the middle). (a) False (b) True
20. 20.💪 A cart is pulled to the right with 45 N and to the left with 50 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
21. 21.Which of these is caused by magnetic force? (a) a compass needle turns (b) brakes stop a bicycle (c) squeezing a lemon (d) a river flows downhill
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
23. 23.💪 Which force is at work: shoes grip the floor? (a) magnetic force (b) gravity (c) friction (d) muscular force
24. 24.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) True (b) False
25. 25.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
26. 26.🔍 Which is the odd one out? (a) a road up a hill (b) a wheelchair ramp (c) a round doorknob (d) a truck loading ramp
27. 27.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) the fulcrum moves (d) turning effects match
28. 28.💪 A cart is pulled to the right with 55 N and to the left with 40 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
29. 29.💪 Which force is at work: a compass needle turns? (a) friction (b) gravity (c) muscular force (d) magnetic force
30. 30.🪝 A bucket weighing 360 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
31. 31.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
32. 32.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
33. 33.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) anywhere (d) farther from the pivot
35. 35.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
36. 36.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
37. 37.Which of these is an inclined plane? (a) a claw hammer on a nail (b) a nutcracker (c) a bottle opener (d) a truck loading ramp
38. 38.🛞 How can we reduce friction in a machine? (a) add sand (b) make parts rough (c) press parts harder (d) oil the moving parts
39. 39.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 8 N, sandpaper 10 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?

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