Question

4. An 85 kg object has 2.16 x 10 J of kinetic energy. What is the object's velocity?​

Answer 1

v = 0.713[m/s]

Step-by-step explanation:

Kinetic energy is defined as the product of mass by the squared velocity of a body. In this way with the following expression we can have the kinetic energy as a function of velocity.

`E_(kin)=0.5*m*v^(2)`

where:

m = mass = 85 [kg]

v = velocity [m/s]

Ekin = kinetic energy = 2.16*10 [J]

`2.16*10 = 0.5*85*v^(2)\\v =√(0.508) \\v= 0.713[m/s]`