Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 990 · 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 bucket weighing 160 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
3. 3.💪 A bag has a mass of 18 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
4. 4.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
5. 5.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) the direction of pull (d) gravity
7. 7.💪 A cart is pulled to the right with 45 N and to the left with 55 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
8. 8.True or false: pushing a swing is a push. (a) False (b) True
9. 9.⚙️ A screw is really … (a) a kind of wheel (b) a bent lever (c) a tiny pulley (d) a ramp wrapped round
10. 10.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the effort (c) the pulley (d) the fulcrum
11. 11.Which of these is a lever? (a) a window blind cord (b) a seesaw (c) a crane hook block (d) a door stopper
12. 12.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere
13. 13.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
14. 14.🏋️ Pushing a crate 4 m took 1040 J of work. What force was used, in newtons?
15. 15.True or false: a movable pulley needs effort = load. (a) False (b) True
16. 16.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Meena (600 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 9 N, ice 2 N, a glass sheet 6 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) ice (d) a wooden plank
18. 18.True or false: a movable pulley is on a flagpole top. (a) False (b) True
19. 19.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
21. 21.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) the load floats (d) less effort needed
22. 22.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
23. 23.Which of these is a pulley? (a) a round doorknob (b) a nut and bolt (c) a window blind cord (d) a chisel
24. 24.💪 A cart is pulled to the right with 25 N and to the left with 25 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
25. 25.True or false: a claw hammer on a nail is a lever. (a) True (b) False
26. 26.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) magnetic (d) warm
27. 27.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
28. 28.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
29. 29.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Zoya (560 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
31. 31.⚖️ Which class of lever is a bottle opener? (a) class 2 (b) class 3 (c) class 1
32. 32.Which of these is a screw? (a) a steering wheel (b) a jar lid (c) a claw hammer on a nail (d) an axe blade
33. 33.True or false: kicking a football is a push. (a) False (b) True
34. 34.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 9 N, sandpaper 12 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
36. 36.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a smooth steel slide (d) a grippy rubber sole
37. 37.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
38. 38.True or false: a fixed pulley halves the effort. (a) True (b) False
39. 39.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
40. 40.True or false: a seesaw is a class 3 lever (effort in the middle). (a) True (b) False

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