Question

A ball is thrown vertically upwards with a speed of 20 m/s. How high will it rise? (Take \( g = 10 \, \text{m/s}^2 \))

Hint:

To calculate the maximum height when initial velocity is known and final velocity is zero, use \( h = \frac{u^2}{2g} \).

Answer 1

Step 1: Use the kinematic equation for maximum height.
When a ball is thrown upwards, the maximum height is given by: \[ h = \frac{u^2}{2g} \] Where:
\( u = 20 \, \text{m/s} \)
\( g = 10 \, \text{m/s}^2 \)
Step 2: Substitute the values. \[ h = \frac{(20)^2}{2 \times 10} = \frac{400}{20} = 40 \, \text{m} \]