Motion - Physics Unit 1

Front

What is the resultant velocity of an object moving in opposite directions?

Back

The resultant velocity is the difference between the velocities of the two objects. For example, if a seal swims at 5.0 m/s towards an inlet and a current flows at 1.0 m/s in the opposite direction, the resultant velocity is 5.0 m/s - 1.0 m/s = 4.0 m/s.

Front

What is the significance of significant figures in calculations?

Back

Significant figures indicate the precision of a measurement. When performing calculations, the result should be reported with the same number of significant figures as the measurement with the least number of significant figures.

Front

How do you determine the resultant displacement vector using analytical techniques?

Back

To find the resultant displacement vector, break down each movement into its components (x and y), sum the components, and then use the Pythagorean theorem and trigonometry to find the magnitude and direction.

Front

What happens to objects in free fall in a vacuum?

Back

In a vacuum, all objects fall at the same rate regardless of their mass. This means that a feather and a stone dropped from the same height will hit the ground at the same time.

Front

How do you round numbers to the correct number of decimal places?

Back

When rounding, look at the digit immediately to the right of the last desired decimal place. If it is 5 or greater, round up; if it is less than 5, keep the last digit the same.

Front

What is the formula for calculating velocity?

Back

Velocity is calculated using the formula: Velocity = Displacement / Time. 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 the principle of conservation of momentum?

Back

The principle of conservation of momentum states that in a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event.

Front

How do you calculate the net force acting on an object?

Back

Net force is calculated by vectorially adding all the forces acting on an object. If forces are in the same direction, add them; if they are in opposite directions, subtract them.

Front

What is the formula for calculating displacement?

Back

Displacement can be calculated using the formula: Displacement = Final Position - Initial Position. It is a vector quantity that considers the shortest path between two points.