Question

What would be the mass of the ball described in the photo?

Answer 1

- Mass of the ball = 45 Kg

Step-by-step explanation:

velocity attained by the ball:

Distance/time= 54/9 = 6m/s (meter per sec)

As work done on ball = distance * force applied

= 54*15

= 810 J ----------------- (i)

acc. to the conservation of energy:

work done = kinetic energy + potential energy

= 1/2*m*
`v^(2)` + 0(as object is on ground)

= 1/2*m*
`6^(2)`

= 1/2*36*m

= 18*m ------------------- (ii)

∵,(i) =(ii)

18*m = 810

m=810/18

m= 45kg