Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 710 · 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 cart is pulled to the right with 40 N and to the left with 35 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
2. 2.🪝 A winch has a wheel of radius 24 cm and an axle of radius 3 cm. What effort on the wheel lifts a 160 N bucket on the axle, in newtons? (ideal)
3. 3.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
4. 4.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) glass (d) polished marble
5. 5.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) make new energy (c) switch off gravity (d) stop all friction
6. 6.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) warm (d) magnetic
7. 7.⚙️ A screw is really … (a) a kind of wheel (b) a bent lever (c) a tiny pulley (d) a ramp wrapped round
8. 8.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
9. 9.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
10. 10.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
11. 11.True or false: a movable pulley only changes direction. (a) True (b) False
12. 12.True or false: a crane hook block is a pulley. (a) True (b) False
13. 13.Which of these is a wedge? (a) a water tap handle (b) a knife edge (c) a wood screw (d) a crane hook block
14. 14.💪 A force is a … (a) type of sound (b) push or a pull (c) kind of colour (d) unit of time
15. 15.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
17. 17.⚙️ Which simple machine is a window blind cord? (a) inclined plane (b) pulley (c) wheel and axle (d) screw
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 80 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
19. 19.True or false: a box pushed on carpet gives more friction. (a) False (b) True
20. 20.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
21. 21.💪 Which can a force NOT do? (a) change its colour (b) stop it moving (c) start it moving (d) change its shape
22. 22.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 10 (d) 3
24. 24.🛞 Friction acts … (a) only upwards (b) with the motion (c) only on ice (d) against the motion
25. 25.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
26. 26.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
27. 27.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
28. 28.Which of these is caused by gravity? (a) brakes stop a bicycle (b) a rolling ball slows (c) lifting a school bag (d) a thrown ball comes down
29. 29.⚖️ A seesaw balances. Asha (140 N) sits ? m from the pivot on one side; Arjun (280 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
30. 30.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
31. 31.⚖️ A seesaw balances. Meena (170 N) sits 3 m from the pivot on one side; Ravi (510 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
32. 32.⚖️ A seesaw balances. Zoya (190 N) sits 2 m from the pivot on one side; Asha (380 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
34. 34.💪 Which force is at work: brakes stop a bicycle? (a) magnetic force (b) friction (c) muscular force (d) gravity
35. 35.⚖️ A lever balances when … (a) both weights are equal (b) the fulcrum moves (c) turning effects match (d) the bar is short
36. 36.🏋️ Pushing a crate 9 m took 2790 J of work. What force was used, in newtons?
37. 37.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 80 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
38. 38.True or false: a movable pulley stays in one place. (a) False (b) True
39. 39.Which of these is a wheel and axle? (a) a seesaw (b) a crowbar (c) a playground slide (d) a well winch handle
40. 40.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 120 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?

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