Question

0
11)
What is the work needed to be done to increase the velocity of a car from 30
Kmh-1 to 60 Kmh-1 if the mass of the car is 1500 Kg.
The sum of the kinetic and potential energies of an obiect is called it​

Answer 1

Answer:

The work needed to be done is 675 kJ.

the sum of the Kinetic and potential energies of an object is called its mechanical energy.

Answer 2

Answer:

initial velocity 4=30km/h = 30×5/18 = 25/3 m/s

final velocity v = 60 km/h = 60×5/18= 50/3 m/s

mass = 1500 kg

work done w = 1/2 mv2 - 1/2 mv2

w = m/2 (v2-v2) = 1500/2 × [(50/3)2 - (25/3)2]

156187 j

the sum of kinetic and potential energy of an object is called mechanical energy