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strojnjashka [21]
3 years ago
5

. According to Piaget’s stages of cognitive development, the child does not differentiate between self and other objects. The ch

ild repeats rewarding activities, discovers new ways to get what he or she wants, and may have imaginary friends. Which period is described?
Physics
2 answers:
daser333 [38]3 years ago
4 0
Iouhkpuvivgpgpcpg. Bigot octyou coyote
natali 33 [55]3 years ago
3 0

Answer: sensoriomotor stage.

Explanation:

The characteristics fescribed correspond to Piaget's sensoriomotor stage. The sensorimotor stage covers children from birth to 18–24 months old. Some characteristics are motor activity without use of symbols, learning through experience, repetition and trial and error. The objective of this stage is to understand object permanence and distinvtion of self and others.

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Answer:

Part a)

k = 6.06 \times 10^4 N/m

Part b)

b = 1795.4 kg/s

Explanation:

Part a)

as the mass of the suspension system is given as

m = 2100 kg

also we have

x = 8.5 cm

so now for force balance we have

mg = kx

(525)(9.81) = k(0.085)

k = 6.06 \times 10^4 N/m

Part b)

Now we know that amplitude decreases by 63% in each cycle

so after one cycle the amplitude will become 37% of initial amplitude

so it is given as

A = 0.37 A_o

also we know

A = A_o e^{-bt/2m}

0.37 A_o = A_o e^{-bt/2m}

\frac{bt}{2m} = 1

b = \frac{2m}{t}

here t = time period of one oscillation

so it is

t = 2\pi\sqrt{\frac{m}{k}}

t = 2\pi\sqrt{\frac{525}{6.06 \times 10^4}}

t = 0.58 s

now damping constant is

b = \frac{2(525)}{0.58}

b = 1795.4 kg/s

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