Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 843 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 10 N, sandpaper 12 N, ice 3 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
2. 2.⚖️ A seesaw balances. Ravi (280 N) sits 1 m from the pivot on one side; Arjun (140 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
3. 3.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
4. 4.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
5. 5.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 5 N, a carpet 6 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) ice
7. 7.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
8. 8.True or false: a nut and bolt is a screw. (a) True (b) False
9. 9.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) a wet tiled floor (b) chalk on a gym bar (c) oil on a squeaky hinge (d) skating on ice
11. 11.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
12. 12.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
13. 13.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
14. 14.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
15. 15.Which of these is a lever? (a) a claw hammer on a nail (b) a well-bucket rope wheel (c) a well winch handle (d) a crane hook block
16. 16.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
17. 17.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a smaller rod (axle) (d) a sharp wedge
19. 19.⚙️ Which simple machine is a truck loading ramp? (a) lever (b) screw (c) pulley (d) inclined plane
20. 20.💪 Two children push a box to the right, one with 10 N and the other with 85 N. What is the net (total) force on the box, in newtons?
21. 21.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a crowbar (c) the tip of a nail (d) a nutcracker
22. 22.⚙️ Which simple machine is a well-bucket rope wheel? (a) lever (b) wedge (c) inclined plane (d) pulley
23. 23.Which of these is caused by gravity? (a) brakes stop a bicycle (b) lifting a school bag (c) a fridge magnet sticks (d) a thrown ball comes down
24. 24.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the axle (d) the load
25. 25.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the effort (d) the fulcrum
26. 26.🔍 Which is the odd one out? (a) a playground slide (b) a road up a hill (c) a wheelchair ramp (d) a well-bucket rope wheel
27. 27.🏋️ A force of 60 N pushes a cart 10 m along the floor. How much work is done, in joules?
28. 28.⚙️ Which simple machine is a screw jack? (a) lever (b) screw (c) pulley (d) wheel and axle
29. 29.True or false: a smooth steel slide gives less friction. (a) False (b) True
30. 30.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
31. 31.💪 A box weighs 130 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
32. 32.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
33. 33.⚖️ A lever bar balances. The load is 500 N at 10 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.🏋️ Pushing a crate 10 m took 4900 J of work. What force was used, in newtons?
35. 35.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
36. 36.Which of these is caused by friction? (a) shoes grip the floor (b) a magnet picks up pins (c) squeezing a lemon (d) a fridge magnet sticks
37. 37.True or false: a rough doormat gives less friction. (a) True (b) False
38. 38.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
39. 39.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) friction (c) muscular force (d) gravity
40. 40.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 2 (c) class 3

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