Question

what is the work done to increase the velocity of a car from 36 km per hour to 72 km per hour if mass of car is 1500 kg​

Answer 1

Answer:

Plzz give the time taken

U can find work done by using formula

W=M(v-u) /t

Let the time taken be 1 hour then

W=1500 X (20-10)/1

W=15000J

Answer 2

ANSWER-:

$\huge\sf\pink{☞  225000\: J}$

GIVEN-:

$\sf{m →1500 \:kg}$

$\sf{u→ 36 km h⁻¹ =→10 m s⁻¹}$

$\sf{v →72 km h⁻¹ = 20 m s⁻¹}$

TO FIND-:

$\sf{W = ?}$

SOLUTION-:

Work done = Change in kinetic energy

$\sf{→{\frac{1}{2} m (v² - u²)}}$

$\sf{→{\frac{1}{2}× 1500 x (20² - 10²)}}$

$\sf{☞  225000\: J}$