Answer:
The kinetic energy of the astronaut is far greater than that of the truck; 2,334,111,728.4Joules
Explanation:
Given the mass of the truck to be 20000kg and its velocity to be 110km/hr, its velocity in meter/seconds will give;
110×1000m/1×3600s
= 110000m/3600s
= 30.6m/s
KE of the truck = 1/2MV²
= 1/2×20000×30.6²
KE = 9,363,600Joules
KE of truck = 9.363MJ
Similarly, given mass of the astronaut to be 80kg and velocity of 27500km/hr, converting the velocity to m/s we have:
27500×1000m/1×3600s
= 27,500,000/3600
= 7638.9m/s
Its kinetic energy will be;
KE = 1/2×80×7638.9²
KE = 2,334,111,728.4Joules
KE = 2.33GJ
The kinetic energy of the astronaut is approximately 2.33gigaJoules
This shows that the kinetic energy of the astronaut is far greater than that of the truck.
