monicatcrzz monicatcrzz
  • 11-01-2021
  • Physics
contestada

what is momentum of 1.5 kg boulder dropped from a cliff after 3.0 s

Respuesta :

PhantomWisdom PhantomWisdom
  • 19-01-2021

Given :

Mass of object, m = 1.5 kg.

To Find :

The momentum of boulder dropped from a cliff after 3 seconds.

Solution :

Speed of boulder after 3 seconds of free fall is given by :

v = u + gt       ( Equation of motion )

v = 0 + 10×3    ( g = acceleration due to gravity )

v = 30 m/s

Now, momentum is given by :

P = m × v

P = 1.5 kg × 30 m/s

P = 45 kg m/s

Therefore, momentum of boulder is 45 kg m/s.

Answer Link

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