العلوم الصف الثالث الاعدادى الترم الاول

An observer in a moving car with 80 km\h was observing a moving car with 90 km\h in the same direction, so the observed speed of the second car is .......... *

If the relative speed of a car is 50 km\h relative to an observer in a bus moves in the same direction at 70 km\h,therefore the actual speed of this car is ........ *

The speed of a moving object relative to an observer in another moving object is called .......speed. *

A car moves at a regular speed equals 90 km\h, this means that the car covers a distance equals ........ metre in 40 sec . *

When the body covers equal distances at unequal intervals of time,this means that the body moves at ......... *

A car moves at a regular speed equals 90 km\h, this means that the car covers a distance equals ........ metre in 40 sec . *

If a car moves at a uniform speed,where it covers 300 meters in a half minute,then it's speed equal .......metre\second. *

If the uniform speed of a car is 72 km\h, so it's speed (in m\sec ) equals ............ *

When a moving object covers equal distances in equal periods of time, this means that the object moves at ......... *

A train moves at a speed 100 km\h, then it covers a distances of 40 km whithin time .............hours. *