Question

A bus moving with the speed of 5ms-2 the driver increases it's velocity to 25 ms-2 in 10s.
what is the acceleration force if the mass of the bus is 5000kg



this is physics qution
give me the right answer ​

Answer 1

Answer:

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