Physical Science 11.1 Relative motion

Front

What is a frame of reference?

Back

A frame of reference is a set of criteria or stated values in relation to which measurements or judgments can be made. It is essential for determining the motion of an object.

Front

What is relative motion?

Back

Relative motion is the calculation of the motion of an object with regard to some other moving object. It is observed differently depending on the frame of reference.

Front

How do you calculate the resultant velocity of an object?

Back

To calculate the resultant velocity, combine the velocities of the object and the medium it is moving through using vector addition.

Front

What is the velocity of an object?

Back

Velocity is the speed of an object in a specific direction. It is a vector quantity, meaning it has both magnitude and direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is deceleration?

Back

Deceleration is a term used to describe negative acceleration, where an object is slowing down.

Front

If a plane flies east at 250 m/s and the air moves north at 35 m/s, how do you find the velocity with respect to the ground?

Back

Use the Pythagorean theorem to combine the eastward and northward velocities to find the resultant velocity.

Front

What is the formula for calculating the resultant velocity of two perpendicular vectors?

Back

The formula is: Resultant Velocity = √(Vx² + Vy²), where Vx and Vy are the components of the velocity.

Front

What is the significance of the observer's position in measuring velocity?

Back

The observer's position affects the measurement of velocity because different frames of reference can yield different velocity values for the same object.

Front

How does the current of a river affect the speed of a boat crossing it?

Back

The current adds a velocity component to the boat's motion, which must be accounted for to determine the boat's resultant speed relative to the shore.