How much work is required to make a 1400 kg car increase its speed from 10 m/s to 20 m/s?

7000J

Explanation:

Given parameters:

Mass of car  = 1400kg

Initial speed  = 10m/s

Final speed  = 20m/s

Unknown:

Amount of work done  = ?

Solution:

In this problem, the amount of work done is the same as the change in kinetic energy of the body.

So;

   Work done  = Final kinetic energy  - initial kinetic energy

           Kinetic energy  =  m v²

   Work done  =  m(V²f - V²i )

m is the mass

vf is the final velocity

vi is the initial velocity

   Work done  =   x 1400 x (20 - 10)  = 7000J

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

terd muffin is the correct answer