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
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
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.
is the answer 31.6 or 1000 for the first answer
To calculate the speed of the oil tanker, we can use the formula for kinetic energy:
Kinetic Energy (KE) = 1/2 * mass * velocity^2
Given:
Mass of the oil tanker (m) = 100,000 tonnes = 100,000,000 kg
Kinetic Energy (KE) = 200 MJ = 200,000,000 J (1 MJ = 1,000,000 J)
Rearranging the formula, we get:
velocity^2 = (2 * KE) / mass
Substituting the given values, we have:
velocity^2 = (2 * 200,000,000 J) / 100,000,000 kg
velocity^2 = 4 J/kg
Taking the square root of both sides, we find:
velocity = sqrt(4 J/kg)
velocity = 2 m/s
Therefore, the speed of the oil tanker is 2 meters per second.