Answer:
70 kg
Step-by-step explanation:
Kinetic energy is the energy acquired by the body while it is moving,i.e. when the body is in motion.It has a unit of joule.
Kinetic energy has the formula of 1/2*m*v*v:
- K.E. = 1/2*m*v² where m = mass, v = velocity during the time the body was in motion
We are given,
- K.E. = 5040 J
- velocity or speed in a certain direction: 12 m/s
We have to find the mass of diver.
Putting the values in the equation of K.E.:
- K.E. = 1/2*m*v²
- 5040 = 1/2*m*12*12..(Cancel 2 and 12 to get 6)
Remember the units are in S.I. system.
- 5040 = m*6*12
- 5040 = m*72
- 5040/72 = 70 = m(Transpose 72 to LHS)
Hence, the mass of the diver is 70 kg.