Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 34 · 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.⚙️ Which simple machine is a steering wheel? (a) wedge (b) inclined plane (c) screw (d) wheel and axle
2. 2.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 120 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.True or false: opening a drawer is a push. (a) False (b) True
4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
5. 5.💪 Two children push a box to the right, one with 70 N and the other with 80 N. What is the net (total) force on the box, in newtons?
6. 6.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) the bar is short (d) turning effects match
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 1 N, a wooden plank 4 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
8. 8.💪 In which unit do we measure force? (a) newton (N) (b) litre (L) (c) metre (m) (d) second (s)
9. 9.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
10. 10.True or false: a movable pulley only changes direction. (a) True (b) False
11. 11.💪 Two children push a box to the right, one with 50 N and the other with 20 N. What is the net (total) force on the box, in newtons?
12. 12.True or false: pulling up your socks is a pull. (a) True (b) False
13. 13.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
14. 14.True or false: closing a drawer is a push. (a) False (b) True
15. 15.True or false: pulling up your socks is a push. (a) True (b) False
16. 16.True or false: pressing a doorbell is a pull. (a) True (b) False
17. 17.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 2 (c) class 1
18. 18.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
19. 19.Which of these is caused by magnetic force? (a) a river flows downhill (b) lifting a school bag (c) a compass needle turns (d) rubbing hands warms them
20. 20.True or false: a nut and bolt is an inclined plane. (a) True (b) False
21. 21.🪝 A load of 150 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
22. 22.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) polished marble (d) ice
23. 23.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 2 (c) class 3
24. 24.True or false: a fixed pulley rises with the load. (a) False (b) True
25. 25.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) a bar on a pivot (d) two ramps back to back
26. 26.⚖️ What is the pivot point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
27. 27.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) False (b) True
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 10 N, a glass sheet 3 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 7 N, a carpet 11 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
30. 30.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) far from the fulcrum (c) on the fulcrum (d) on the rock
31. 31.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
32. 32.💪 In a tug of war, one team pulls left with 25 N and the other pulls right with 20 N. What is the size of the net force, in newtons?
33. 33.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
34. 34.🪝 A pulley system lifts a 680 N load with an effort of 170 N. What is its mechanical advantage (MA)?
35. 35.⚙️ Which simple machine is a seesaw? (a) wheel and axle (b) pulley (c) inclined plane (d) lever
36. 36.True or false: a movable pulley stays in one place. (a) False (b) True
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
38. 38.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
39. 39.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
40. 40.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction

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