Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 831 · 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: pushing a trolley is a pull. (a) False (b) True
2. 2.🛞 Friction acts … (a) only upwards (b) only on ice (c) with the motion (d) against the motion
3. 3.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 1 (c) class 3
4. 4.True or false: a wheelchair ramp is an inclined plane. (a) True (b) False
5. 5.Which of these is caused by magnetic force? (a) a rolling ball slows (b) squeezing a lemon (c) lifting a school bag (d) a fridge magnet sticks
6. 6.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) a grippy rubber sole (d) sand on a slippery path
8. 8.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
9. 9.🏋️ Pushing a crate 7 m took 350 J of work. What force was used, in newtons?
10. 10.True or false: your forearm is a class 1 lever (fulcrum in the middle). (a) False (b) True
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 5 N, sandpaper 9 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
12. 12.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
13. 13.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 9 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
15. 15.True or false: a nutcracker is a class 2 lever (load in the middle). (a) True (b) False
16. 16.⚙️ Which simple machine is a playground slide? (a) inclined plane (b) wheel and axle (c) lever (d) screw
17. 17.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
18. 18.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
19. 19.⚙️ Which simple machine is a well winch handle? (a) lever (b) pulley (c) wheel and axle (d) wedge
20. 20.🏋️ Pushing a crate 5 m took 2250 J of work. What force was used, in newtons?
21. 21.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
22. 22.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 2 N, a glass sheet 4 N, a carpet 5 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
24. 24.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
25. 25.⚖️ A seesaw balances. Zoya (170 N) sits ? m from the pivot on one side; Meena (340 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
26. 26.🏋️ A force of 320 N pushes a cart 4 m along the floor. How much work is done, in joules?
27. 27.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
28. 28.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a tyre with deep treads (c) a box pushed on carpet (d) a grippy rubber sole
29. 29.⚙️ Which simple machine is a nutcracker? (a) lever (b) wedge (c) screw (d) inclined plane
30. 30.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
31. 31.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) both weights are equal (d) the fulcrum moves
32. 32.🔍 Which is the odd one out? (a) powder on a carrom board (b) a grippy rubber sole (c) a wet tiled floor (d) a wheel on ball bearings
33. 33.💪 A force is a … (a) push or a pull (b) type of sound (c) unit of time (d) kind of colour
34. 34.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
35. 35.🪝 A pulley system lifts an 80 N load with an effort of 20 N. What is its mechanical advantage (MA)?
36. 36.Which of these is an inclined plane? (a) a crane hook block (b) a bottle opener (c) a wheelchair ramp (d) a chisel
37. 37.💪 Which force pulls everything towards the Earth? (a) wind (b) gravity (c) friction (d) magnetism
38. 38.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
39. 39.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 450 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.Which of these is caused by gravity? (a) a magnet picks up pins (b) rubbing hands warms them (c) squeezing a lemon (d) a thrown ball comes down

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