SATHEE: Laws Of Motion Question 322

Laws Of Motion Question 322

Question: A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 m height further, find the magnitude of the force. (Consider $g = 10 m / s^{2}$ ).

Options:

A) 4 N

B) 16 N

C) 20 N

D) 22 N

Show Answer

Answer:

Correct Answer: D

Solution:

[d] Let the velocity of the ball just when it leaves the hand is u then applying ,

$v^{2} - u^{2} = 2 a S$ For upward journey

$\Rightarrow - u^{2} = 2 (- 10) \times 2 \Rightarrow u^{2} = 40$

Again applying $v^{2} - u^{2} = 2 a S$

for the upward journey of the ball, when the ball is in the hands of the thrower,

$v^{2} - u^{2} = 2 a S$

$\Rightarrow 40 - 0 = 2 (a) 0.2 \Rightarrow a = 100 m / s^{2}$

$∴ F = m a = 0.2 \times 100 = 20 N$

$\Rightarrow N - m g = 20 \Rightarrow N = 20 + 2 = 22 N$

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Laws Of Motion Question 322

Question: A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 m height further, find the magnitude of the force. (Consider $g = 10 m / s^{2}$ ).

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

Laws Of Motion Question 322

Question: A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 m height further, find the magnitude of the force. (Considerg=10m/s2 ).

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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Question: A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 m height further, find the magnitude of the force. (Consider $g = 10 m / s^{2}$ ).