A particle $$$P$$$ is projected vertically upwards with speed $$$v \mathrm{~m} \mathrm{~s}^{-1}$$$ from a point on the ground. $$$P$$$ reaches its greatest height after $$$3 \mathrm{~s}$$$. Find the greatest height of $$$P$$$ above the ground. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

Mathematics

IGCSE&ALevel

CAIE

Exam No：9709_w20_qp_43 Year：2020 Question No：1(b)

Answer:

$\left[0=30^{2}+2(-10) s\right]$
Greatest height is $45 \mathrm{~m}$

Knowledge points:

4.2.4 use appropriate formulae for motion with constant acceleration in a straight line. （Questions may involve setting up more than one equation, using information about the motion of different particles.）

Answer:

Knowledge points:

Solution:

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