SATHEE: Properties Of Solids And Liquids Question 276

Properties Of Solids And Liquids Question 276

Question: A ball whose density is 0.4 × 103 kg/m3 falls into water from a height of 9 cm . To what depth does the ball sink

Options:

A)9 cm

B)6 cm

C)4.5 cm

D)2.25 cm

Show Answer

Answer:

Correct Answer: B

Solution:

The velocity of ball before entering the water surface $v = \sqrt{2 g h} = \sqrt{2 g \times 9}$

When ball enters into water, due to upthrust of water the velocity of ball decreases (or retarded)The retardation, a = $\frac{apparent weight}{mass of ball}$

$\frac{= V (ρ - σ) g}{V ρ}$

$= (\frac{ρ - σ}{ρ}) g$

$= (\frac{0.4 - 1}{0.4}) \times g$

$= - \frac{3}{2} g$ If h be the depth upto which ball sink, then, $0 - v^{2} = 2 \times (- \frac{3}{2} g) \times h$

therefore $2 g \times 9 = 3 g h$ \ h = 6 cm.

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अगला

Properties Of Solids And Liquids Question 276

Question: A ball whose density is 0.4 × 103 kg/m3 falls into water from a height of 9 cm . To what depth does the ball sink

Options:

Answer:

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

Properties Of Solids And Liquids Question 276

Question: A ball whose density is 0.4 × 103 kg/m3 falls into water from a height of 9 cm . To what depth does the ball sink

Options:

Answer:

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

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