semester 1 Review part 1

Front

What is displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, along with the direction. It can be zero if the object returns to its starting point.

Front

What does a velocity vs. time graph represent?

Back

A velocity vs. time graph shows how the velocity of an object changes over time. A horizontal line indicates constant velocity, while a sloped line indicates acceleration or deceleration.

Front

What is the effect of balanced forces on an object's motion?

Back

Balanced forces result in no change in motion; the object either remains at rest or continues to move at a constant velocity.

Front

What is the direction of the gravitational force acting on an object in free fall?

Back

The gravitational force always acts downward towards the center of the Earth.

Front

How do you calculate net force?

Back

Net force is calculated by subtracting opposing forces from each other. If a person pulls a box with a force and friction opposes it, the net force is the difference between these two forces.

Front

What is the acceleration due to gravity?

Back

The acceleration due to gravity is approximately 9.81 m/s² and is constant for all objects in free fall near the Earth's surface.

Front

What happens to the velocity of an object when it is acted upon by unbalanced forces?

Back

The velocity of the object changes, resulting in acceleration or deceleration depending on the direction of the net force.

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 a vector?

Back

A vector is a quantity that has both magnitude and direction, such as force, velocity, and displacement.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, acting parallel to the surfaces in contact.