PHYSICS [1 Mark Question Answer]

Equation of motion gives us the picture of motion of moving body.

A flying bird most likely to have a non uniform velocity.

No the speed of a body cannot be negative.

Velocity corresponds to the rate of change of displacement.

-30 m/s is speed.

Average speed of a body can be defined as ratio of total distance covered by a body In total time.

If a body falls towards earth then it would have a positive acceleration.

Negative acceleration corresponds to situation when velocity is continuously decereasing with respect to the time.

Positive acceleration corresponds to situation when velocity is continuously increasing with respect to the time.

Yes area under a speed time graph in a given interval gives the total distance covered by a body.

No the relation S = v X t cannot used to find the total distance covered by a body moving with non-uniform speed.

Speed of a body can be defined as distance covered by the body in unit time.

Acceleration of a body is rate of change of its velocity with respect to the time.

Speed and velocity of a moving body become equal when the body moves in a straight line.

Yes uniform speed and constant speed have same meaning.

Examples of scalars are distance and mass.

Out of Force and Energy, Force is a vector quantity.

Yes rest and motion are relative to each other.

A body is said to be in motion when it change its position with respect to its surrounding objects with time.

A vector is represented by an arrow. The length of the arrow represents the magnitude of vector quantity and arrow head gives the direction of vector quantity.

A vector quantity is that physical quantity which is represented by both magnitude and direction.

If a body is moving in a straight line then the displacement of a body is equal to the distance travelled by it.

Yes a body can have negative displacement.

SI unit for measurement of distance and diplacement is metre denoted by m.

The displacement of a moving body is defined as the change in its position along a particular direction

Displacement of an object between two points is the shortest distance between these two points.
“It is the unique path that can take the body from its initial to the final position.”

No the distance covered by a body cannot be less than the magnitude of its displacement.

A body is said to be in state of rest if it does not change its position with respect to its surrounding objects with time.

Yes we can multiply vectors.

No we cannot subtract a scalar quantity from a vector quantity. Reverse is also not true.

Yes we can subtract two scalars.

No we cannot add a scalar quantity to a vector quantity.

Yes we can multiply two scalars.

Yes we can add two vectors.

Yes we can add two scalars.

The physical quantity representing the magnitude and its direction is a vector quantity.

The platform is in motion with respect to train. As train is moving with respect to platform so platform would also look in motion with respect to train.

Passengers sitting in a train are at rest with respect to each other.

A vector quantity is represented only when its magnitude and direction are specified so this quantity is a vector quantity.