1.

what work is to be done in order to increase the velocity of a car from 18 km per hour to90km per hour.if the mass of the car is2000kg

Answer» \red{HEY\:BUDDY!!}

HERE'S THE ANSWER...

_____________________________

♠️ According to work ENERGY THEOREM CHANGE in kinetic energy is also know as work done , i.e.

=> \blue{ Work\:= K_{f} - K_{i}}

⏺️ Mass ( m ) = 2000 kg

⏺️ Initial velocity ( U ) = 18 Km/h

=> 18 × 5 / 18

=> 5 m/s

⏺️Final Velocity ( V ) = 90 Km/h

=> 90 × 5 / 18

=> 25 m/s

▶️ Now , putting values in formula

=> \texttt{ W\:=\: K_{f} - K_{i}}

=> \texttt{ W\:=\: 1/2 m ( v^{2} - u^{2})}

=> \texttt{ W\:=\: 1/2 (2000) ( 25^{2} - 5^{2})}

=>\texttt{ W\:=\: (1000) (625 - 25)}

=> \texttt{ W\:=\: (1000) (600)}

=>\boxed{ W\:=\: 6 × 10^5 Joules}


HOPE HELPED..

\red{JAI \:HIND..}

PEACE✌️☺️


Discussion

No Comment Found

Related InterviewSolutions