Asked by jessy
an oil tanker has a mass of 100 000 tonnes. its kinetic energy is 200 MJ.Calculate its speed.
(1Tonne=1000kg, 1 MJ= 1 Megajoule=
1 000 000 J)
PLEASE HELP
(1Tonne=1000kg, 1 MJ= 1 Megajoule=
1 000 000 J)
PLEASE HELP
Answers
Answered by
jessy
a car of mass 800kg is travelling at a steady speed. the kinetic energy of the car is 160 000 J. show carefully that the speed of the car is 72 Km per hour
Answered by
Dr Russ
For the first one
Use Ke = 0.5 mv^2
Ke = 200 MJ or 2 x 10^8 J
m= 100,000 tonnes or 1 x 10^8 kg
substitue and solve for v.
the same approach will answer the second one. Note that speed is in km per hour not Km per hour.
Use Ke = 0.5 mv^2
Ke = 200 MJ or 2 x 10^8 J
m= 100,000 tonnes or 1 x 10^8 kg
substitue and solve for v.
the same approach will answer the second one. Note that speed is in km per hour not Km per hour.
Answered by
jessy
is the answer 31.6 or 1000 for the first answer