4-1.Newton's Laws of Motion
easy

चित्र $0.4\, kg$ द्रव्यमान के एक पिण्ड की एक-विमीय गति का स्थिति-समय $(x-t)$ ग्राफ दर्शाता है। प्रत्येक आवेग का परिमाण .............. $N-s$ है।

A

$0.2$

B

$0.4$

C

$0.8$ 

D

$1.6$

(AIEEE-2010)

Solution

From the graph, it is a straight line so, uniform motion. Because of impulse direction of velocity changes as can be seen from the slope of the graph.

Initial velocity $=\frac{2}{2}=1 m / s$

${ Final velocity } =-\frac{2}{2}=-1 m / s$

$\overrightarrow{{ P }_{i}} =0.4 N – s$

$\overrightarrow{ P_f } =-0.4 N – s$

$\overrightarrow J =\overline{ P }_{f}-\overline{ P }_{i} =-0.4-0.4=-0.8 N – s ( J = impulse )$

$|\overrightarrow J |=0.8 N – s$

Standard 11
Physics

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