Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 940 · 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 of these is a screw? (a) a chisel (b) the tip of a nail (c) a bottle cap (d) a well winch handle
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
3. 3.Which of these is a wedge? (a) a nutcracker (b) a well winch handle (c) a jar lid (d) a chisel
4. 4.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) muscular force (c) gravity (d) friction
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
6. 6.Which of these is caused by friction? (a) a magnet picks up pins (b) squeezing a lemon (c) a thrown ball comes down (d) brakes stop a bicycle
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 7 N, sandpaper 9 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
8. 8.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
9. 9.⚙️ Which simple machine is a crane hook block? (a) inclined plane (b) pulley (c) lever (d) screw
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 4 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
11. 11.True or false: a tyre with deep treads gives more friction. (a) False (b) True
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 3 N, a glass sheet 4 N, a carpet 8 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
13. 13.💪 A box weighs 370 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
14. 14.🔍 Which is the odd one out? (a) a seesaw (b) a claw hammer on a nail (c) a crowbar (d) a nut and bolt
15. 15.💪 A bag has a mass of 31 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
16. 16.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
17. 17.⚖️ A seesaw balances. Ravi (280 N) sits 3 m from the pivot on one side; Meena (420 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
18. 18.🪝 A winch has a wheel of radius 14 cm and an axle of radius 2 cm. What effort on the wheel lifts a 560 N bucket on the axle, in newtons? (ideal)
19. 19.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) chalk on a gym bar (d) skating on ice
20. 20.True or false: a movable pulley is on a flagpole top. (a) False (b) True
21. 21.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
22. 22.True or false: a crane hook block is a pulley. (a) False (b) True
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a wooden plank 9 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
24. 24.True or false: a fixed pulley stays in one place. (a) False (b) True
25. 25.🛞 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 5 N, sandpaper 7 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
27. 27.True or false: a box pushed on carpet gives less friction. (a) True (b) False
28. 28.True or false: a fixed pulley halves the effort. (a) True (b) False
29. 29.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
30. 30.True or false: pulling a cart is a push. (a) True (b) False
31. 31.💪 A box weighs 290 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
32. 32.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
33. 33.⚖️ A seesaw balances. Arjun (280 N) sits 3 m from the pivot on one side; Asha (420 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
34. 34.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
35. 35.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
36. 36.⚙️ Which simple machine is a bottle cap? (a) inclined plane (b) lever (c) screw (d) wheel and axle
37. 37.⚖️ A lever bar balances. The load is 400 N at 10 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
38. 38.⚙️ Which simple machine is a wheelchair ramp? (a) lever (b) pulley (c) screw (d) inclined plane
39. 39.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
40. 40.True or false: a rough doormat gives less friction. (a) False (b) True

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