Acar covers 72 kilometers in the first hour of its journey. in the next hour, it covers 90 kilometers. what is the amount of work done by the car? the total mass of the car, including its passengers, is 2.5 × 103 kilograms.

The work done is

Work Done = Change in Kinetic Energy (ΔKE)

Explanation

In first 1 hour it travels 72 km

So, Velocity =

or, Initial Velocity (u) = 20 m/s

Similarly for the next hour it covers 90 km

So, Velocity =

or, Final Velocity (v) = 20 m/s

Work done = Change in Kinetic Energy (ΔKE)

Work done = ΔKE =

ΔKE =

= = 281250 joule  

=

answer; how far out of place which the object finished relative to the starting location;

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.