Q1-L4-S2-Kinematics: Motion in 2D and 3D

Q1-L4-S2-Kinematics: Motion in 2D and 3D

SHS Physics 1

Synchronous Session

Open Ended

Grade Level and Section

Let's have first a review about freefall!

Multiple Choice

The more mass an object has, the faster it will fall.

• True

• False

Multiple Choice

If you throw a baseball straight up, what is its velocity at the highest point?

• 9.8 m/s²

• 9.8 m/s

• 0 m/s²

• 0 m/s

Multiple Choice

If you throw a baseball straight up, what is its acceleration at the highest point?

• 9.8 m/s²

• 0 m/s

• 9.8 m/s

• 0 m/s

Multiple Choice

If you throw a crayon straight up at 12m/s, how fast is its speed when you catch it at the same height?

• 6 m/s

• 12 m/s

• 18 m/s

• 24 m/s

Lesson 4 Includes the topics:

• Projectile Motion

• Circular motion

Lesson 4 Includes the topics:

• Projectile Motion

• Circular motion

Projectile Motion

Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity.

The object is called a projectile, and its path is called its trajectory.

Key Terms

Projectile Motion - an object that is thrown and affected by gravity.

Trajectory - the path followed by the projectile.

The purple ones are freefall and the green ones are projectile motion

Multiple Choice

What is the vertical acceleration of a projectile? (assuming constant velocity)

• 0 m/s²

• 9.8 m/s²

Multiple Choice

What is the horizontal acceleration of a projectile? (assuming constant velocity)

• 0 m/s²

• 9.8 m/s²

Multiple Choice

As an object travels through the air, its vertical velocity

• changes continuously

• remains the same

Let's have a closer look using the simulation shown in the screen

Multiple Choice

When a ball is projected horizontally, what is its initial vertical velocity?

• 10

• 0

Multiple Choice

An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which one has the greater range? (assume no air resistance)

• 25 degrees

• 65 degrees

• same for both 25 and 65 degrees

Multiple Choice

An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees. Which is in the air for longer? (assume no air resistance)

• 25 degrees

• 65 degrees

• same for both 25 and 65 degrees

Multiple Choice

If a bullet is horizontally shot at the same moment another bullet is dropped from the same height, which will hit the ground first?

• Shot Bullet

• Dropped Bullet

• Hit at Same Time

Multiple Choice

What force acts in the y-direction/y-axis that causes an object to travel in a parabolic arc?

• Friction

• Gravity

• Tension

• No force acting