Physics Concepts: Motion and Forces

Front

What is motion?

Back

Change in position of an object with time.

Front

What is rest?

Back

An object is at rest if it does not change its position with time relative to its surroundings.

Front

Define distance.

Back

Total path length covered by an object (scalar).

Front

Define displacement.

Back

Shortest distance between initial and final position (vector).

Front

Difference between distance and displacement?

Back

Distance: scalar, always positive, total path. Displacement: vector, can be negative/zero, shortest path.

Front

Define speed.

Back

Rate of change of distance with time (scalar).

Front

Define velocity.

Back

Rate of change of displacement with time (vector).

Front

Difference between speed and velocity?

Back

Speed: scalar, depends on distance, always positive. Velocity: vector, depends on displacement, can be negative.

Front

Define acceleration.

Back

Rate of change of velocity with time (vector).

Front

Uniform acceleration?

Back

Velocity changes by equal amounts in equal time intervals.