1. Motion
Speed, Velocity, and
Acceleration

2. 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

3. 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

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

5. Average speed
Total distance divided by
the total time
Formula:
Total distance
total time

6. Velocity
Speed in a given direction
Velocities in the same
direction combine by adding
Velocities in different
directions combine by
subtracting

7. 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

8. Acceleration
The change in velocity
Acceleration is measured
in m/sec/sec or m/sec2
Formula is:
(final velocity - original
velocity)/time

9. Deceleration vs. Acceleration
A decrease in velocity is
deceleration or negative
acceleration
A distance-time graph for
acceleration is always a
curve

10. Centripetal Acceleration
Acceleration directed
toward the center of
circular path

11. Momentum
Momentum is equal to
the mass of an object
times its velocity
momentum= mass x
velocity

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

13. THANK
YOU
SUBMITTED BY:-
RITIK SHARMA
CLASS-9th
-D
ROLL NO-7