A ball is dropped from rest and falls 30 m to reach point B. Ignoring air resistance, what is the velocity at point B?

Here's a step-by-step solution to the problem:

Let's define downwards as the positive direction. The acceleration due to gravity is $a = +9.8 \text{ m/s}^2$.

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3.1 Name the type of motion described above.

The object is released from rest and falls under the influence of gravity only, with air friction ignored. This type of motion is called free fall.

Answer for 3.1:
Free fall

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3.2 Calculate the:

3.2.1 Magnitude of the velocity of the object at point B

We consider the motion from point B to point C.

• Displacement, $\Delta y = 30 \