10. you have a 36 - tooth gear seen below, turning in a counterclockwise direction. you want to reduce its…
10. you have a 36 - tooth gear seen below, turning in a counterclockwise direction. you want to reduce its overall speed as much as possible while maintaining the counterclockwise direction.\nhow could you create a gear train using the gear above as the driver and any or all of the gear options below so that the 36 - tooth gear reduces its speed as much as possible but still continues to rotate counterclockwise. justify your choice and draw the gear train diagram. (just use circles in the picture and label gears a, b or c being used)\ngear a (small) gear b (medium - sized) gear c (large)\n12 teeth 24 teeth 60 teeth\n11. on your answer sheet is a picture of a pile driver being used to break up rock in order to make room for a new building. each arrow indicates the area where a component is subjected to a constraint. check off the correct constraint for each component. (answers may be used more than once)\n12. two diagrams of a tape roll dispenser are shown below.\na - specify what acts as a guiding control for the movement of the sellotape roll.\nb - indicate the type of guiding involved.\n13. give a positive and a negative characteristic of a metal water bottle. /2
Answer
10.
Explanation:
Step1: Understand gear - ratio concept
The gear - ratio (r=\frac{N_{driven}}{N_{driver}}), where (N) is the number of teeth. To reduce speed, we want a large gear - ratio and keep the direction the same. We can use an even number of gear pairs to maintain the counter - clockwise direction.
Step2: Select gears
We can use the 36 - tooth gear as the driver. First, pair it with gear A (12 teeth). The gear - ratio of the first pair is (r_1=\frac{12}{36}=\frac{1}{3}). Then pair gear A with gear C (60 teeth). The gear - ratio of the second pair is (r_2=\frac{60}{12} = 5). The overall gear - ratio (r = r_1\times r_2=\frac{1}{3}\times5=\frac{5}{3}).
Step3: Draw the gear train
Draw three circles. Label the first circle (driver) as the 36 - tooth gear. Connect it to a second circle labeled A (12 - tooth gear). Then connect circle A to a third circle labeled C (60 - tooth gear).
Answer:
Use the 36 - tooth gear as the driver, pair it with gear A first and then pair gear A with gear C. Draw three circles labeled as the 36 - tooth gear, gear A, and gear C respectively and connect them in sequence.
11.
Sorry, the picture of the pile - driver on the answer sheet is not provided, so this question cannot be answered.
12.
Explanation:
a - Specify guiding control
In both diagrams, the slot in the tape - roll dispenser acts as a guiding control for the movement of the Sellotape roll. It restricts the lateral movement of the roll and guides it as the tape is pulled out.
b - Indicate type of guiding
The type of guiding involved is linear guiding. The slot provides a linear path for the roll to move along as the tape is dispensed.
Answer:
a - The slot acts as a guiding control for the movement of the Sellotape roll. b - Linear guiding.
13.
Explanation:
Positive characteristic
A positive characteristic of a metal water bottle is that it is durable. Metals like stainless steel can withstand drops, impacts, and long - term use without breaking easily.
Negative characteristic
A negative characteristic is that metal water bottles can transfer heat more easily than some other materials. If the liquid inside is hot or cold, the outer surface of the bottle can become too hot or too cold to hold comfortably without a sleeve.
Answer:
Positive characteristic: Durable. Negative characteristic: Transfers heat easily.