Vertical Motion and Gravity Concepts

Professor Dave explains vertical motion, focusing on the role of gravity as a constant acceleration of -9.8 m/s². He compares vertical and horizontal motion, emphasizing the direction of gravity. Two examples are provided: a rock in free fall and a rock thrown upwards, illustrating calculations for time and velocity using kinematic equations. The video concludes with a call to action for viewers to subscribe and support the channel.

What is the constant acceleration due to Earth's gravity used in vertical motion calculations?

• 9.8 meters per second

• 9.8 meters per second squared

• -9.8 meters per second squared

• 0 meters per second squared

In vertical motion, which direction is conventionally considered negative?

• Upwards

• Sideways

• Towards the right

• Downwards

If a rock is dropped from a height, what is its initial velocity?

• 10 m/s

• 5 m/s

• 0 m/s

• -10 m/s

How long does it take for a rock to fall from a 100-meter cliff?

• 6.5 seconds

• 5.5 seconds

• 4.5 seconds

• 3.5 seconds

What is the velocity of a rock at impact when dropped from a 100-meter cliff?

• 54.1 m/s

• -54.1 m/s

• 44.1 m/s

• -44.1 m/s

What happens to the velocity of a rock thrown upwards as it rises?

• It increases

• It remains constant

• It becomes zero

• It decreases

How long does it take for a rock thrown upwards at 10 m/s to hit the ground?

• 4.65 seconds

• 5.65 seconds

• 6.65 seconds

• 7.65 seconds

What is the velocity of a rock at impact when thrown upwards with an initial velocity of 10 m/s?

• -45.4 m/s

• -35.4 m/s

• -65.4 m/s

• -55.4 m/s

Which equation is used to solve for time when both t and t squared terms are present?

• Linear equation

• Quadratic equation

• Cubic equation

• Exponential equation

What remains constant in both vertical and horizontal motion?

• Displacement

• Time

• Acceleration due to gravity

• Velocity