Respuesta :
Answer:
Energy dissipated = 540 kJ
Explanation:
Energy dissipated = Change in kinetic energy
Initial velocity = 30 m/s
Mass, m = 1200 kg
[tex]\texttt{Initial kinetic energy = }\frac{1}{2}mv^2=0.5\times 1200\times 30^2=540000J[/tex]
Final velocity = 0 m/s
[tex]\texttt{Final kinetic energy = }\frac{1}{2}mv^2=0.5\times 1200\times 0^2=0J[/tex]
Energy dissipated = Change in kinetic energy = 540000-0 = 540000J
Energy dissipated = 540 kJ
Answer:540 kJ
Explanation:
Given
mass of car [tex]m=1200 kg[/tex]
Initial speed of car [tex]v_1=30 m/s[/tex]
Final speed of car [tex]v_2=0 m/s[/tex]
Energy dissipated=change in kinetic Energy
Energy dissipated=Initial Kinetic Energy-Final Kinetic Energy
Energy dissipated[tex]=\frac{mv_i^2}{2}-\frac{mv_f^2}{2}[/tex]
Energy dissipated[tex]=\frac{1200\times 30^2}{2}[/tex]
Energy dissipated[tex]=540 kJ[/tex]
