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Plzzzz solve it......​

Answer»

Given :-

\bullet\sf speed_1= 50km/h\\ \\ \bullet\sf Distance_1= 100km\\ \\ \bullet\sf Speed_2= 20km/h\\ \\ \bullet\sf Distance_2=200km

To find :-

◆Identify the motion of car is UNIFORM or not

◆ AVERAGE SPEED of car !

find the average speed

\bigstar{\boxed{\sf Average \ speed = \dfrac{Total \ Distance }{Total \ Time }}}

Find the time covered by car T1

\longrightarrow\sf Speed = \dfrac{Distance }{Time }\\ \\ \longrightarrow\sf 50=\dfrac{100}{Time}\\ \\ \longrightarrow\sf 50\times Time = 100\\ \\ \longrightarrow\sf Time = \cancel{\dfrac{100}{50}}\\ \\ \longrightarrow\sf Time_1= 2 \ hours

Now Time 2

\longrightarrow\sf 20= \dfrac{200}{Time}\\ \\ \longrightarrow\sf Time = \cancel{\dfrac{200}{20}}\\ \\ \longrightarrow\sf Time_2= 10 hours

Find the average speed

\longrightarrow\sf Av.\ speed = \dfrac{D_1+D_2}{T_1+T_2}\\ \\ \longrightarrow\sf Av.\ speed = \dfrac{100+200}{2+10}\\ \\ \longrightarrow\sf Av.\ speed = \cancel{\dfrac{300}{12}}\\ \\ \longrightarrow\sf Av. \ speed =25km/h

\boxed{\textsf{\textbf{ Average \ sped \ of \ car = 25km/h}}}

◆ The motion of car is non uniform

◆ REFER to graph


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