Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 634 · 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.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) the direction of pull (d) gravity
2. 2.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a wooden plank 9 N, a carpet 13 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
4. 4.True or false: pushing a trolley is a push. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a water tap handle (b) a flagpole rope wheel (c) a steering wheel (d) a well winch handle
6. 6.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
7. 7.💪 In a tug of war, one team pulls left with 70 N and the other pulls right with 35 N. What is the size of the net force, in newtons?
8. 8.💪 A box weighs 350 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
9. 9.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 3 (c) class 2
10. 10.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 4 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 3 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
12. 12.True or false: a lemon squeezer is a class 2 lever (load in the middle). (a) True (b) False
13. 13.⚙️ Which simple machine is a truck loading ramp? (a) pulley (b) screw (c) inclined plane (d) lever
14. 14.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
15. 15.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
16. 16.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
17. 17.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Arjun (360 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
18. 18.⚙️ Which simple machine is a screw jack? (a) wedge (b) inclined plane (c) wheel and axle (d) screw
19. 19.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) switch off gravity (c) use a smaller force (d) stop all friction
20. 20.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) farther from the pivot (d) closer to the pivot
21. 21.🏋️ Pushing a crate 7 m took 2170 J of work. What force was used, in newtons?
22. 22.⚙️ Which simple machine is a seesaw? (a) wedge (b) lever (c) pulley (d) screw
23. 23.⚖️ A lever bar balances. The load is 140 N at 40 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.True or false: pressing a doorbell is a push. (a) False (b) True
25. 25.⚖️ A seesaw balances. Asha (380 N) sits 1 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
27. 27.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
28. 28.⚖️ A lever bar balances. The load is 80 N at 40 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.True or false: an axe blade is a wedge. (a) False (b) True
30. 30.Which of these is caused by gravity? (a) squeezing a lemon (b) a thrown ball comes down (c) brakes stop a bicycle (d) a fridge magnet sticks
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 5 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
32. 32.⚖️ 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
33. 33.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) True (b) False
34. 34.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 500 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.True or false: a wheelchair ramp is a screw. (a) False (b) True
36. 36.True or false: pulling a cart is a push. (a) False (b) True
37. 37.Which of these is caused by magnetic force? (a) an apple falls down (b) lifting a school bag (c) a river flows downhill (d) a magnet picks up pins
38. 38.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
39. 39.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
40. 40.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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