Motion

Speed, Velocity, and Acceleration

Frames of Reference The object or point from which

movement is determined Movement is relative to an object

that appears stationary Earth is the most common frame

of reference

Motion Motion is a change in position

relative to a frame of reference Speed is the distance traveled

in a given amount of time Speed=distance time

Speed

The units for speed: meters/second (m/sec) kilometers/hour (km/hr) Speed that does not change

is constant speed

Average speed

Total distance divided by the total time

Formula: Total distance total time

Velocity Speed in a given direction Velocities in the same direction

combine by adding Velocities in different

directions combine by subtracting

Interesting fact

Rockets are launched in the same direction of the earth’s rotation to get an extra boost of 1800 km/hr to its speed

Acceleration The change in velocity Acceleration is measured in

m/sec/sec or m/sec2

Formula is: (final velocity - original

velocity)/time

Deceleration vs. Acceleration A decrease in velocity is

deceleration or negative acceleration

A distance-time graph for acceleration is always a curve

Centripetal Acceleration

Acceleration directed toward the center of circular path

Momentum Momentum is equal to the mass of an object times its velocity

momentum= mass x velocity

Conserving Momentum The law of conservation of momentum states that the total momentum is NOT lost, only transferred

THANK YOU

SUBMITTED BY:- RITIK SHARMA CLASS-9th-D ROLL NO-7