2
$v^2 = u^2 + 2as$
$u = 12, a = -3, s = 18$
(a) Work out a value of $v$ - Edexcel - GCSE Maths - Question 3 - 2018 - Paper 1
Question 3
2
$v^2 = u^2 + 2as$
$u = 12, a = -3, s = 18$
(a) Work out a value of $v$.
(b) Make $s$ the subject of
$v^2 = u^2 + 2as$
Worked Solution & Example Answer:2
$v^2 = u^2 + 2as$
$u = 12, a = -3, s = 18$
(a) Work out a value of $v$ - Edexcel - GCSE Maths - Question 3 - 2018 - Paper 1
Step 1
(a) Work out a value of v.
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Answer
To find the value of v, we will substitute the given values into the equation:
Start with the equation:
v2=u2+2as
Substitute the values:
u=12,a=−3,s=18
Thus, we have:
v2=122+2(−3)(18)
Calculate the terms:
v2=144+2(−3)(18)v2=144−108v2=36
Finally, take the square root to solve for v:
v=extsqrt(36)=6
Hence, the value of v is 6.
Step 2
(b) Make s the subject of
v^2 = u^2 + 2as
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Answer
To make s the subject of the equation, follow these steps:
Start with the equation:
v2=u2+2as
Rearrange to isolate s:
v2−u2=2as
Divide both sides by 2a to solve for s:
s=2av2−u2
Thus, the formula for s as the subject is:
s=2av2−u2
