Question

find the mass of a car that is traveling at a velocity of 60m/s north. the car has 5,040,000 j of kinetic energy

Answer 1

Foemula:
KE= 1/2mv^2
KE: Kinetic energy (J) m: mass (kg) v: speed (m/s)

5 040 000 = 1/2m(60)^2
5 040 000 = 1800m
m = 2800kg

Hope this helps :)

Answer 2

Answer: The mass of the car is 2800 kg

Step-by-step explanation:

Kinetic energy is defined as the energy which is possessed due to its motion.

It is also defined as the half of the product of mass of the object and square of the velocity of the object.

Mathematically,

`E_K=(1)/(2)mv^2`

where,

`E_K` = kinetic energy of car = 5,040,000 J

m = mass of the car = ? kg

v = velocity of car = 60 m/s

Putting values in above equation, we get:

`5,040,000J=(1)/(2)* m* (60)^2\\\\m=(5,040,000* 2)/(60* 60)=2800kg`

Hence, the mass of the car is 2800 kg