A ROBOT UNLOADS A FINISHED COMPONENT FROM A MACHINE AND PLACES IT ON A GRAVITY CONVEYOR. THE CONVEYOR ACCELERATES FROM REST UNTIL IT REACHES THE BOTTOM OF THE CONVEYOR 4.5 SECONDS LATER. THE COMPONENT IS TRAVELLING AT A VELOCITY OF 1.35 M/S WHEN IT REACHES THE BOTTOM OF THE CONVEYOR WHERE , IT IS THEN STOPPED BY HITTING A BUFFER. THE COMPONENT SITS STATIONARY AWAITING PACKAGING.

 A) DETERMINE THE LINEAR ACCELERATION OF THE COMPONENT AS IT TRAVELS DOWN THE GRAVITY CONVEYOR (IGNORING FRICTIONAL FORCES. 

 B) THE CONVEYOR SECTION LENGTH IS LATER MODIFIED AND EXTENDED BY A FURTHER 1.5M. DETERMINE THE NEW VELOCITY OF THE COMPONENTS WHEN THEY REACH THE BUFFER. 

 C) EXPLAIN THE CAUSE OF THE COMPONENTS ACCELERATING FROM REST DOWN THE CONVEYOR. 

 D) DETERMINE THE FORCE EXERTED BY THE COMPONENT, OF MASS 4.5KG, DOWNWARD ON THE CONVEYOR AS IT SITS AT THE BUFFER. 

 E) EXPLAIN WHY THE COMPONENT DOES NOT ACCELERATE DOWN THROUGH THE CONVEYOR WHILST RESTING AT THE BUFFER.

A)

FOR THE FIRST PART, USE EQUATION V_F = V₀ + AT, WHERE V₀ = 0, T = 4.5 S AND V_F = 1.35 M/S
A = 1.35/4.5 = 0.3 M/S²

B)

KNOWING ACCELERATION AND NEW DISTANCE, YOU CAN DETERMINE THE NEW FINAL SPEED USING EQUATION:
(VF)² = V₀² + 2A*D
THE PROBLEM STATES THAT IT IS EXTENDED BY AN ADDITIONAL 1.5 M, SO YOU’LL HAVE TO FIRST DETERMINE THE INITIAL LENGTH BEFORE THE EXTENSION:
D = VF²/2A = (1.35)^2/(2*.3) = 3.0375 M
NOW YOU ADD 1.5 TO THAT DISTANCE ABOVE AND USE THE FORMULA TO DETERMINE V_F:
V_F = ROOT(2*.3*4.5375) = 1.65M/S

C) GRAVITY

D)

WE KNOW THAT

VELOCITY (V) = ACCELERATION (A) X TIME (T)

1.35 = A X 4.5 ———à A=0.3 M/S²

FORCE (F) = MASS (M) *ACCELERATION (A)

  = 4.5 KG *0.3 M/S² =1.35

E)

THE FORCE EXERTED WILL BE EQUAL TO MASS TIMES THE GRAVITY. THAT IS 4.5*9.81= 44.145 N.

THE COMPONENT DOES NOT ACCELERATE DOWN THE CONVEYOR BELT BECAUSE WHEN ENTIRE ASSEMBLY IS CONSIDERED AS A SYSTEM, IT DOES NOT AFFECT OUR SOLUTION AND AS IT DOES NOT AFFECT THE SOLUTION. THE ACCELERATION OF ALL PARTS IS SAME AND HENCE, COMPONENT MAINTAINS ITS INERTIA UNDER THE EFFECT OF GRAVITY 

 

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Primate Observations

In order to complete this extra credit option, you must visit a large zoological society or a primate reserve where it is possible to view the primates in person. Visit a facility like the San Francisco Zoo – observe primates and classify them. Upload your results.

Remember the Different Primate Types:
Prosimians are lower primates with pointed, dog-like snouts and elongated bodies. They are quadrapedal with a good sense of smell. New World Monkeys are found in the New World and rely heavily on sight. Some have prehensile tails with nostrils that are far apart and open. Old World Monkeys are found in the Old World and have nostrils that are narrow and close. Some have ischial callosities with no prehensile tails. Apes are the most advanced primates, found in Asia and Africa. They do not have tails, their forearms are longer and chests are barrel-shaped.

Part 1:
Choose five (5) different primate species to observe for a few minutes each.
(identify the primate, describe its method of locomotion, and note where it prefers to rest)

1. Which primate species is this?
Does this primate mostly sit, jump, climb, brachiate, hang or run?
Does this primate prefer the high canopy, middle canopy, or the ground?

2. Which primate species is this?
Does this primate mostly sit, jump, climb, brachiate, hang or run?
Does this primate prefer the high canopy, middle canopy, or the ground?

3. Which primate species is this?
Does this primate mostly sit, jump, climb, brachiate, hang or run?
Does this primate prefer the high canopy, middle canopy, or the ground?

4. Which primate species is this?
Does this primate mostly sit, jump, climb, brachiate, hang or run?
Does this primate prefer the high canopy, middle canopy, or the ground?

5. Which primate species is this?
Does this primate mostly sit, jump, climb, brachiate, hang or run?
Does this primate prefer the high canopy, middle canopy, or the ground?

Part 2:
Select one (1) species and describe at least four (4) forms of social interaction you observe them doing. (choose active primates and think about affiliative behaviors)

1. Identify your focal primate species:

2. Describe Social Interaction A:

3. Describe Social Interaction B:

4. Describe Social Interaction C:

5. Describe Social Interaction D:

 

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