A 50 kg ball traveling at 20 m/s would have
kinetic energy
A 50 kg ball traveling at 5 m/s would have
W kinetic energy
A 50 kg person falling at 10 m/s would have
kinetic energy.

A : 10000 J

B: 625 J

C: 2500 J

Step-by-step explanation:

Step 1:

We know that ,

Kinetic Energy is given by ((1/2) × m × V²) J

where m = Mass of substance

            V = Velocity

Step 2:

In first case, m= 50 kg, V=20 m/s

Kinetic energy = 0.5 × 50 × 20 ×20

                         =  10000 J

In second case, m= 50 kg, V=20 m/s

Kinetic energy = 0.5 × 50 × 5 ×5

                         =  625 J

In Third case, m= 50 kg, V=10 m/s

Kinetic energy = 0.5 × 50 × 10 ×10

                         =  2500 J