SATHEE: Work Energy And Power Question 151

Work Energy And Power Question 151

Question: A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in the figure. If it starts its journey from rest at $x = 0$ , its velocity at $x = 12$ m is

Options:

A) $0 m / s$

B) $20 \sqrt{2} m / s$

C) $20 \sqrt{3} m / s$

D) $40 m / s$

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Answer:

Correct Answer: D

Solution:

[d] Area between curve and displacement axis $= \frac{1}{2} \times (12 + 4) \times 10 = 80 J$

In this time, body acquires kinetic energy = $\frac{1}{2} m v^{2}$

By the law of conservation of energy $\frac{1}{2} m v^{2} = 80 J$

$\Rightarrow \frac{1}{2} \times 0.1 \times v^{2} = 80$

$\Rightarrow v^{2} = 1600$

$\Rightarrow v = 40 m / s$

Work Energy And Power Question 151

Question: A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in the figure. If it starts its journey from rest at $x = 0$ , its velocity at $x = 12$ m is

Options:

Answer:

Solution:

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Work Energy And Power Question 151

Question: A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in the figure. If it starts its journey from rest at x=0 , its velocity at x=12 m is

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: A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in the figure. If it starts its journey from rest at $x = 0$ , its velocity at $x = 12$ m is