Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 848 · 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.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
2. 2.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
3. 3.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
4. 4.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a smaller rod (axle) (c) a flat ramp (d) a sharp wedge
5. 5.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
6. 6.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
8. 8.⚙️ Which simple machine is a window blind cord? (a) inclined plane (b) lever (c) wedge (d) pulley
9. 9.Which of these is a wedge? (a) a wood screw (b) the tip of a nail (c) a screw jack (d) a well-bucket rope wheel
10. 10.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
11. 11.Which of these is a pulley? (a) a crane hook block (b) a bottle opener (c) a screw jack (d) a seesaw
12. 12.🪝 A winch has a wheel of radius 12 cm and an axle of radius 2 cm. What effort on the wheel lifts a 300 N bucket on the axle, in newtons? (ideal)
13. 13.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
14. 14.True or false: a well winch handle is a wheel and axle. (a) False (b) True
15. 15.🛞 How can we reduce friction in a machine? (a) press parts harder (b) add sand (c) make parts rough (d) oil the moving parts
16. 16.True or false: a fixed pulley halves the effort. (a) False (b) True
17. 17.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
18. 18.True or false: a movable pulley halves the effort. (a) False (b) True
19. 19.🏋️ A force of 20 N pushes a cart 6 m along the floor. How much work is done, in joules?
20. 20.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) the fulcrum moves (d) both weights are equal
21. 21.⚖️ A seesaw balances. Zoya (200 N) sits 2 m from the pivot on one side; Arjun (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
22. 22.⚙️ A screw is really … (a) a tiny pulley (b) a ramp wrapped round (c) a kind of wheel (d) a bent lever
23. 23.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
24. 24.⚖️ A lever bar balances. The load is 250 N at ? cm from the fulcrum. The effort is 50 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
26. 26.⚙️ Which simple machine is a wheelchair ramp? (a) wedge (b) pulley (c) inclined plane (d) wheel and axle
27. 27.🏋️ A force of 430 N did 3870 J of work. How many metres did the object move?
28. 28.Which of these is an inclined plane? (a) a crowbar (b) a crane hook block (c) the tip of a nail (d) a truck loading ramp
29. 29.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
30. 30.True or false: a door stopper is a wedge. (a) True (b) False
31. 31.💪 In which unit do we measure force? (a) litre (L) (b) second (s) (c) newton (N) (d) metre (m)
32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
34. 34.⚖️ A lever bar balances. The load is 50 N at ? cm from the fulcrum. The effort is 40 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
36. 36.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.⚖️ A seesaw balances. Zoya (420 N) sits ? m from the pivot on one side; Ravi (140 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
38. 38.True or false: a movable pulley stays in one place. (a) True (b) False
39. 39.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
40. 40.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to go slower (d) to look nice

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