(i)[3]
particle $P$’s initial acceleration.
(ii)[4]
the speed of $P$ when it reaches $A$.
Mathematics 9709 · AS & A Level · Probability
Probability — practice question
A particle $P$ with mass $0.4\,\text{kg}$ is connected to one end of a light elastic string whose natural length is $1.2\,\text{m}$ and modulus of elasticity $19.2\,\text{N}$. The other end of the string is fixed at point $A$. Particle $P$ is released from rest at a point $2.7\,\text{m}$ vertically above $A$. Calculate