Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 995 · 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.True or false: a crowbar is a lever. (a) True (b) False
2. 2.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.⚙️ Which simple machine is a seesaw? (a) wheel and axle (b) wedge (c) lever (d) screw
4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
5. 5.⚖️ What is the pivot point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
6. 6.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
7. 7.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) False (b) True
8. 8.🪝 A pulley system lifts a 630 N load with an effort of 210 N. What is its mechanical advantage (MA)?
9. 9.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
10. 10.🪝 A well winch has a handle (wheel) of radius 5 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
11. 11.Which of these is a wheel and axle? (a) a water tap handle (b) a knife edge (c) a seesaw (d) the tip of a nail
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 60 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
13. 13.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
14. 14.🪝 A bucket weighing 360 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
15. 15.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
16. 16.💪 A box weighs 430 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
17. 17.⚙️ Which simple machine is a bottle opener? (a) pulley (b) screw (c) inclined plane (d) lever
18. 18.⚖️ A lever bar balances. The load is 640 N at 50 cm from the fulcrum. The effort is 400 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) switch off gravity (c) make new energy (d) use a smaller force
20. 20.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
21. 21.Which of these is a screw? (a) a round doorknob (b) a flagpole rope wheel (c) a jar lid (d) a well-bucket rope wheel
22. 22.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) warm (d) magnetic
23. 23.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
25. 25.Which of these is caused by friction? (a) squeezing a lemon (b) a rolling ball slows (c) a fridge magnet sticks (d) pedalling a cycle
26. 26.⚖️ A lever bar balances. The load is 560 N at 10 cm from the fulcrum. The effort is 80 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
28. 28.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
29. 29.Which of these is caused by friction? (a) an apple falls down (b) a compass needle turns (c) pedalling a cycle (d) shoes grip the floor
30. 30.💪 Which can a force NOT do? (a) change its shape (b) change its colour (c) stop it moving (d) start it moving
31. 31.True or false: closing a drawer is a push. (a) True (b) False
32. 32.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
33. 33.💪 A cart is pulled to the right with 40 N and to the left with 30 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
34. 34.🏋️ A force of 270 N did 270 J of work. How many metres did the object move?
35. 35.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
36. 36.True or false: a screw jack is a lever. (a) True (b) False
37. 37.⚖️ A seesaw balances. Meena (160 N) sits 4 m from the pivot on one side; Asha (640 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.⚖️ A lever bar balances. The load is 480 N at ? cm from the fulcrum. The effort is 300 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
40. 40.💪 A bag has a mass of 50 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?

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