56 Science Mandy Watson Lowes Elementary MOTION AND

5/6 Science Mandy Watson Lowes Elementary

MOTION AND FORCE CHAPTER ONE

FRAME OF REFERENCE The background or point that is used for comparison when motion is described. The most common frame of reference is the Earth.

What is motion? Motion is the change in position relative to the frame of reference in a certain amount of time.

What is speed? What is the formula for speed Speed is the rate at which an object moves. Speed = Distance Time

A car travels 240 kilometers in 3 hours. What is the speed of the car during that time? 80 km/hr

What is velocity? Velocity is speed in a given direction.

What is acceleration? What is the formula for acceleration? The rate of change in velocity is known as acceleration. Acceleration = final velocity – original velocity time

A car is traveling at 60 km/hr. It accelerates to 85 km/hr in 5 seconds. What is the acceleration of the car? 18, 000 kilometers/hour

Circular Motion The velocity is continuously changing because direction is continuously changing. An object in circular motion is accelerating even though its speed may be constant.

What is momentum? Momentum is equal to the mass of an object multiplied by its velocity Momentum = Mass x Velocity

How is momentum conserved? The total momentum of any group of objects remains the same unless outside influences act on the objects.

GOOD LUCK ON YOUR TEST! Make sure and study!