Motion

What is a frame of reference?

• A set of objects that are moving with respect to each other.

• A set of objects that are not moving with respect to each other.

• A single object in motion.

• A point in space with no objects around.

How can motions be described?

• In isolation from any objects.

• In comparison to a frame of reference.

• By observing a single moving object.

• By measuring the speed of light.

How are displacements combined?

• Using vector addition

• Using scalar multiplication

• Using matrix subtraction

• Using differential equations

What is the definition of displacement?

• The length of a straight line from the starting point to the ending point

• The length of an object's actual path from a starting point to an end point

• The time taken to travel from one point to another

• The speed of an object in a given direction

How is distance different from displacement?

• Distance is always shorter than displacement

• Distance is the length of an object's actual path

• Distance is measured in a straight line

• Distance is the time taken to travel

What does velocity describe?

• Only speed

• Only direction

• Both speed and direction

• Neither speed nor direction

What shows the speed on a distance-time graph?

• The slope of the line

• The y-intercept of the line

• The area under the line

• The x-intercept of the line

What is the difference between average speed and instantaneous speed?

• Average speed is calculated for the entire duration of a trip, while instantaneous speed is determined at a single moment.

• Average speed is determined at a single moment, while instantaneous speed is calculated for the entire duration of a trip.

• Both average speed and instantaneous speed are calculated for the entire duration of a trip.

• Both average speed and instantaneous speed are determined at a single moment.

What is the equation for acceleration?

• a = (vf - vi) / t

• a = (vi + vf) / t

• a = (vf * vi) / t

• a = (vf - vi) * t

How can two or more velocities be combined?

• By vector addition

• By scalar multiplication

• By subtracting them

• By dividing them