Physics, asked by duleshwaripatel2424, 7 hours ago

if the mass of car is 200kg then how much work will be done to increase its velocity from 36km per hr to 72 km/hr​

Answers

Answered by rameshrajput16h
0

Answer:

Correct option is

B

131250J

Initial Velocity, u=54km/hr=15m/s

Final velocity , v=72km/hr=20m/s

Mass =1500kg

Initial kinetic energy

2

1

mu

2

2

1

1500×15×15=168750J

Final kinetic energy

2

1

mv

2

2

1

1500×20×20=300000J

So, change in kinetic energy = work done=300000−168750=131250J

Answered by deborahcatherinedas
0

u=36*5/18 =10 m/s

v =72 *5/18 =20 m/s

m = 200 kg

work done = (1/2)*200*(20*20-10*10)

=100 (400-100) = 100 * 300 =30 K JOULES

Explanation:

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