A ball, of mass 0.1 kg, is dropped from a height of 12 m, What is its momentum when it stikes the ground, in kg m/s?
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Luca B.
| Certified Educator
calendarEducator since 2011
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You need to remember the formula of momentum such that:
`p = m*v`
You should use the kinematic equation that helps you to find the velocity such that:
`v^2 = v_0^2 + 2a*x`
Since the initial velocity is...
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vickyprabhucool | Student
known data:
m=0.1kg,h=12m
unknown data:
momentum=?
formula:
momentum=mass*velocity
velocity(V^2)=Vo^2+2ax
Vo=initial displacement(i.e)=0
a=gravitational force(m/s)=9.81m/s
h (or) x=displacement(m)
momentum=0.1*(2*9.8*12)^1/2
=1.5 kg m/s.
Student Answers