Calculate the work done required to stop a car of mass 50 kg moving with a velocity of 54 km/hr.
Share
Calculate the work done required to stop a car of mass 50 kg moving with a velocity of 54 km/hr.
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
When a object is moving with a constant velocity, it possess K.E
K.E=
2
1
×m×v
2
So, in order to bring the object to rest i.e its same magnitude of energy is required so, as the final final energy comes to zero.
v=60km/hr=16.66m/s
So, magnitude of work that needs to be done =
2
1
×m×v
2
Hence, work required to stop the car =
2
1
×1500×16.66
2
=208166.7J=208.17kJ
Answer refers to the attachment.