m = mass of the ball = ?
v = velocity of the ball = 35 m/s
λ = wavelength of the ball = 8.92 x 10⁻³⁴ m
h = plank's constant = 6.63 x 10⁻³⁴ J-sec
according to Debroglie principle , wavelength is given as
λ = h/(mv)
inserting the values
8.92 x 10⁻³⁴ = (6.63 x 10⁻³⁴)/(m (35))
m = (6.63 x 10⁻³⁴)/((8.92 x 10⁻³⁴) (35))
m = 6.63 /(8.92 x 35)
m = 0.0212 kg
So the mass of the ball comes out to be 0.0212 kg
