What is the definition of motion in one dimension?

Motion in one dimension refers to movement along a straight line, either forward or backward.

The zero mark on a ruler is an example of a ___ point.

Reference

True or False: Distance is a vector quantity that includes both size and direction.

False. Distance is a scalar quantity that only includes size, while displacement is a vector quantity that includes both size and direction.

Fill in the blank: In an experiment, Point A is located 5 cm to the right of the origin and Point B is located ___ cm to the left of the origin.

3

Riddle: I measure how far you have traveled along a winding road, but I am not the straight-line distance between your start and finish. What am I?

Distance

How do you describe the direction of motion in a one-dimensional context?

Direction can be described as positive or negative, using terms like up, down, north, south, east, west, or using compass bearings in degrees.

In a 400 m race, the distance covered is ___ m regardless of the runner's path.

400

Displacement is defined as the ___ distance between the initial and final positions.

Straight-line

What is the main difference between distance and displacement?

Distance is total path, displacement is shortest.

• Distance measures total length traveled.

• Displacement considers direction and shortest path.

• Distance is a scalar, displacement is a vector.

The speed of an object is a ___ quantity that measures how fast it is moving without considering direction.

Scalar

True or False: Velocity is defined as the rate of change of distance.

False. Velocity is defined as the rate of change of displacement, which includes direction.

Fill in the blank: If Thabo walks 2 km on a winding road, his distance traveled is ___ km.

2

What is the average speed of Usain Bolt if he runs 200 m in 19.19 seconds?

The average speed is calculated as distance divided by time, which is 200 m / 19.19 s = 10.42 m/s.

Riddle: I can be measured in meters per second, but I tell you nothing about your direction. What am I?

Speed

What is the significance of velocity in motion analysis compared to speed?

Velocity includes direction and speed.

• Essential for motion analysis.

• Indicates complete motion description.

• Helps in predicting object's path.

Karabo jogs 5 km in 30 minutes. What is her speed in km/h?

Her speed is 10 km/h, calculated by dividing the distance of 5 km by the time of 0.5 hours (30 minutes).

Fill in the blank: Displacement can be described as the shortest path from the starting point to the endpoint in a specific ___ .

Direction

True or False: Speed and velocity are interchangeable terms in physics.

False. Speed is a scalar quantity that does not include direction, while velocity is a vector quantity that includes both speed and direction.

What is the significance of connecting vectors tail-to-head when drawing vector diagrams?

Connecting vectors tail-to-head is crucial.

• Ensures accurate resultant vector calculation.

• Represents total displacement or velocity.

• Facilitates understanding of vector addition.

Acceleration is defined as the change in ___ over time.

Velocity

True or False: An object can experience acceleration even if its speed remains constant.

False. Acceleration occurs only when there is a change in velocity, which includes changes in speed or direction.

Fill in the blank: If an object's acceleration and velocity have the same sign, the object is ___ down.

Speeding

What does a negative acceleration indicate when related to an object's velocity?

Negative acceleration indicates that the object is slowing down if the velocity is positive or speeding up if the velocity is negative.

Riddle: I show how fast something is speeding up or slowing down, measured in m/s². What am I?

Acceleration

What happens to the acceleration of an object if it moves in a negative direction and speeds up?

The acceleration will be negative, as it reflects an increase in speed while moving in the negative direction.