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Thanks a lot.for Q4 a ii)
Ek = p^2/2m
1/2mv^2 = (mv)^2/2m (since, p=mv)
1/2mv^2= mv^2/2 (m and m cancels out)
1/2mv^2 = 1/2mv^2. (Hence, Proven)
for Q4 b i)
find change in momentum first,
delta p = m*delta v
p= 0.035*(4.5+3.5)
p=0.28.
F=change in momentum/change in time
F=0.28/0.14
F=2.0N.
Can someone explain this question?