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The given formula is:

\[
v = u + at
\]

You are asked to find \( u \), where \( v = 48 \), \( a = 5 \), and \( t = 6 \).

We can rearrange the formula to solve for \( u \):

\[
u = v - at
\]

Now substitute the values:

\[
u = 48 - (5 \times 6) = 48 - 30 = 18
\]

So, the initial velocity \( u \) is 18.

Would you like more details or further explanation? 

Here are some related questions for practice:
1. What is the value of \( t \) if \( v = 100 \), \( u = 20 \), and \( a = 8 \)?
2. How would you solve for \( a \) in the equation \( v = u + at \)?
3. If \( v = 60 \), \( a = 4 \), and \( u = 20 \), what is \( t \)?
4. What does the formula \( v = u + at \) represent in physics?
5. How does increasing acceleration \( a \) affect the final velocity \( v \)?

**Tip:** Always isolate the variable you're solving for by rearranging the equation, then substitute known values to compute it directly.

Given the formula v = u + at, find u if v = 48, a = 5, t = 6.

Learn how to find the initial velocity (u) using the formula v = u + at, with v = 48, a = 5, and t = 6. This problem covers basic kinematics and algebra, suitable for Grades 9-10 students.

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