SATHEE: Kinematics Question 644

Kinematics Question 644

Question: Three particles A, B and C are thrown from the top of a tower with the same speed. a is thrown up, b is thrown down and c is horizontally. They hit the ground with speeds $v_{A}$ , $v_{B}$ and $v_{C}$ respectively then,

Options:

A) $v_{A} = v_{B} = v_{C}$

B) $v_{A} = v_{B} v_{C}$

C) $v_{A} v_{C} v_{B}$

D) $v_{A} v_{B} = v_{C}$

Show Answer

Answer:

Correct Answer: A

Solution:

[a] For A: It goes up with velocity u will it reaches it’s maximum height (i.e. velocity becomes zero) and comes back to O and attains velocity u..

Using $v^{2} = u^{2} + 2 a s \Rightarrow v_{A} = \sqrt{u^{2} + 2 g h}$

For B, going down with velocity u

$\Rightarrow v_{B} = \sqrt{u^{2} + 2 gh}$

For C, horizontal velocity remains same, i.e. u.

Vertical velocity $= \sqrt{0 + 2 gh} = \sqrt{2 gh}$

The resultant $v_{C} = \sqrt{{v_{x}}^{2} + {v_{y}}^{2}} = \sqrt{u^{2} +2gh} .$

Hence $v_{A} = v_{B} = v_{C}$

Kinematics Question 644

Question: Three particles A, B and C are thrown from the top of a tower with the same speed. a is thrown up, b is thrown down and c is horizontally. They hit the ground with speeds $v_{A}$ , $v_{B}$ and $v_{C}$ respectively then,

Options:

Answer:

Solution:

Engineering Preparation

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NCERT Books & Solutions

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Other Resources

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Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Kinematics Question 644

Question: Three particles A, B and C are thrown from the top of a tower with the same speed. a is thrown up, b is thrown down and c is horizontally. They hit the ground with speeds vA , vB and vC respectively then,

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: Three particles A, B and C are thrown from the top of a tower with the same speed. a is thrown up, b is thrown down and c is horizontally. They hit the ground with speeds $v_{A}$ , $v_{B}$ and $v_{C}$ respectively then,