Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 754 · 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.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.🏋️ A force of 60 N did 600 J of work. How many metres did the object move?
3. 3.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
5. 5.True or false: plucking a mango is a pull. (a) False (b) True
6. 6.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 2 (c) class 1
7. 7.🪝 A well winch has a handle (wheel) of radius 9 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
8. 8.True or false: pushing a swing is a pull. (a) True (b) False
9. 9.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
10. 10.💪 Which force is at work: a rolling ball slows? (a) muscular force (b) magnetic force (c) friction (d) gravity
11. 11.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
12. 12.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) True (b) False
13. 13.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
14. 14.💪 Two children push a box to the right, one with 75 N and the other with 70 N. What is the net (total) force on the box, in newtons?
15. 15.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) both weights are equal (d) the bar is short
16. 16.Which of these is a wedge? (a) a flagpole rope wheel (b) a round doorknob (c) a water tap handle (d) a door stopper
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 9 N, sandpaper 13 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
18. 18.True or false: a tyre with deep treads gives less friction. (a) True (b) False
19. 19.🪝 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
20. 20.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
21. 21.True or false: kicking a football is a push. (a) False (b) True
22. 22.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
23. 23.⚖️ 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
24. 24.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
25. 25.Which of these is a wedge? (a) a knife edge (b) a well winch handle (c) a claw hammer on a nail (d) a water tap handle
26. 26.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Zoya (130 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) stop all friction (c) use a smaller force (d) switch off gravity
28. 28.⚖️ A lever bar balances. The load is 150 N at ? cm from the fulcrum. The effort is 150 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
31. 31.True or false: powder on a carrom board gives more friction. (a) True (b) False
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
33. 33.🪝 A bucket weighing 90 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
34. 34.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
35. 35.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wheel on ball bearings (c) a grippy rubber sole (d) a smooth steel slide
36. 36.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
37. 37.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) the axle
38. 38.🔍 Which is the odd one out? (a) a round doorknob (b) the tip of a nail (c) a well winch handle (d) a water tap handle
39. 39.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
40. 40.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem

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