Vertical Motion and Free Fall

The video tutorial explains free fall problems, focusing on objects thrown up or down. It covers the concept of initial velocity being positive or negative, the constant acceleration due to gravity, and the use of motion equations in free fall scenarios. Through example problems, it demonstrates how to calculate maximum height, time in the air, and final velocity of a thrown ball.

What is the initial velocity of an object thrown upwards?

• Negative

• Zero

• Positive

• Depends on the object's weight

What is the value of acceleration due to gravity near the Earth's surface?

• 9.8 m/s²

• 10 m/s²

• 8.9 m/s²

• 9.5 m/s²

In free fall motion equations, what does 'g' represent?

• Acceleration due to gravity

• Displacement

• Final velocity

• Initial velocity

When calculating vertical motion, which variable is used instead of 'x'?

• z

• t

• y

• v

What is the maximum height reached by a ball thrown upwards with an initial velocity of 4.9 m/s?

• 3.0 meters

• 2.5 meters

• 1.5 meters

• 1.225 meters

At the maximum height of a thrown object, what is its velocity?

• Equal to initial velocity

• Zero

• Equal to final velocity

• Equal to acceleration

How long does it take for the ball to return to the same height it was thrown from?

• 0.5 seconds

• 1 second

• 1.5 seconds

• 2 seconds

What is the time taken for the ball to reach its maximum height?

• 1.5 seconds

• 1 second

• 0.5 seconds

• 2 seconds

What is the velocity of the ball when it returns to the hand?

• 9.8 m/s downwards

• 0 m/s

• 4.9 m/s downwards

• 4.9 m/s upwards

In free fall, how does the velocity of an object at the same height compare when going up and coming down?

• Velocities are equal in magnitude but opposite in direction

• Velocities are equal in both magnitude and direction

• Velocity is greater when going up

• Velocity is greater when coming down