Unit 1 exam

The change of object's position as time pass .......

• Acceleration

• Motion

• Speed

• Velocity

The measuring unit of acceleration is ......

• m/sec2 

• meter

• second

• m/sec

All of the following are vector physical quantity except ......

• Displacement

• Displacement

• Mass

• Acceleration

If the uniform speed of the car is 72 km/h , so its speed in m/sec is ........

• 20 m/sec

• 90 m/sec

• 25 m/sec

• 18 m/sec

The relative speed of a moving object relative to an observer moves at the same speed in the opposite direction is ......... the actual speed

• double

• same

• half

• quarter

Draw a graph which represents a body moves at zero acceleration

Give reasons for

pilots takes in consideration the velocity of wind

Give reason for

speed is scalar physical quantity , while velocity is vector physical quantity

Decelerating motion means that he object speed increases by time

• true

• false

Relative speed is the speed of an object relative to an observer

• true

• false