Respuesta :

Ritmeks

Answer:

20

Explanation:

Speed is 10 m/s

Kinetic energy is 1000joules

Mass is ?

Therefore the mass can be calculated as follows

K.E= 1/2mv^2

1000= 1/2 × m × 10^2

1000= 1/2 × m × 100

1000= 100m/2

2000= 100m

m= 2000/100

m= 20

Hence the mass is 20kg