A ball is projected upwards with an initial velocity of 20 m/s. Calculate the time taken to reach a point P on its way down where its speed is 6.87 m/s. Use equations of motion and take upwards as pos

Here are the solutions to Question 3:

3.1 Define the term projectile.

A projectile is an object upon which the only force acting is the force of gravity.

3.2 Using EQUATIONS OF MOTIONS ONLY, calculate:

We will take upwards as the positive direction and downwards as the negative direction. The acceleration due to gravity is $a = -9.8 \text{ m}\cdot\text{s}^{-2}$.

3.2.1 Time taken for ball A to reach point P on its way down.

Ball A is projected upwards with $v_i = 20 \text{ m}\cdot\text{s}^{-1}$. On its way down, its speed at point P is $6.87 \