Motion in one direction

a- ---------- and------------- are necessary factors to describe motion.

• distance & time

• Speed & distance

• Time& speed

• uniform speed

------------ is the change of an object's position as time passes according to the position of another object.

• speed

• time

• motion

The simplest type of motion is the motion in --------, the path of moving object may be---------- or-------------- or combined from both.

• two direction, forward or backward

• One direction,regular or irregular.

• One direction, forward or backward

90 km/hour equals-----------------

• 90 hours

• 90 km

• 90 km. in one hour.

Total distances covered by an object divided through total time take to cover this distance.

• Average speed

• motion

It is the speed of a moving object relative to an observer.

• Relative speed

• speed

It is the change of the object's position by equal distances at equal periods of time.

• Non-uniform speed

• uniform speed