# What is relative motion class 11?

Relative motion is the calculation of the motion of an object with regard to some other moving object. Thus, the motion is not calculated with reference to the earth, but is the velocity of the object in reference to the other moving object as if it were in a static state.

## What is relative velocity explain with an example class 11th?

We encounter occasions where one or more objects move in a frame which is non-stationary with respect to another observer. For example, a boat crossing a river that is flowing at some rate or an aeroplane encountering wind during its motion.

## What is drift in river boat problems?

Answer: Due to speed of water flow in river, a person either swimming or floating stationary in the river experiences a pushing force along the flow direction.

## What is relative motion formula?

Relative Motion in One Dimension →vPE=→vPT+→vTE. Note the ordering of the subscripts for the various reference frames in Equation 4.6. 1. The subscripts for the coupling reference frame, which is the train, appear consecutively in the right-hand side of the equation.

## What you mean by relative motion?

Relative Motion refers to the motion or speed of any object in respect to a particular point. For example, a ball thrown upward while in a moving object such as a bus, would be traveling the same speed with respect to the bus and would fall again in relation to that speed.

## What is the SI unit of relative velocity?

The SI unit of Relative velocity is Meter per second.

## What is relative velocity Class 11 formula?

The velocity is measured within the object according to the observer. It can be measured using the use of an intermediate reference frame. In simpler terms, this can be the vector sum of the velocities. The relative velocity formula is expressed as. V → = V A B → + V B C →

## Is relative motion and relative velocity same?

Relative motion is the motion compared to some frame of reference other than ground and when the motion is defined with respect to the ground, the frame of reference becomes ground. If the two objects are moving in the same direction, the relative velocity decreases for both objects.

## What is minimum drift?

Minimum Drift. Problem: A boat moves relative to water with a velocity 10 km/hr. The velocity of river flow is 5 km/hr.

## How is upstream speed calculated?

1. Upstream = (u−v) km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
2. Downstream = (u+v)Km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
3. Speed of Boat in Still Water = ½ (Downstream Speed + Upstream Speed)

## What is velocity in still water?

Velocity of boat in still water is 13m/s.

## What is the formula of relative velocity?

Mathematically, we nay say that the relative velocity will be the vector difference between the velocities of two objects. The relative velocity of A with respect to B= velocity of the body A – velocity of the body B.

## What is resultant velocity formula?

Any vector v in ℝ2 can be expressed as [||v|| cos θ, ||v|| sin θ], where θ is the angle v forms with the positive x-axis. The resultant velocity of an object is the sum of its individual vector velocities.

## How do you calculate resultant speed?

Multiply the acceleration by the time the object is being accelerated. For example, if an object falls for 3 seconds, multiply 3 by 9.8 meters per second squared, which is the acceleration from gravity. The resultant velocity in this case is 29.4 meters per second.

## Why is relative motion important?

Behind it, there lies a very important concept of relative motion, which will make us understand why objects appear to move differently with different frames.

## Who discovered relative motion?

Galileo was the first to point out the obvious: all motion is relative. When I say something like “the ball is traveling at 50 mph towards me,” I implicitly add “relative to my head.” If I’m on a train, someone standing on the platform would add the speed of the train to the speed of the ball to get the “total” speed.

## Is relative velocity important for JEE?

Relative Velocity All Velocities are relative and will not have any significance unless the observer is specified.

## What is the difference between absolute and relative motion?

What is the difference between absolute and relative motion? Absolute motion is the change of position of a body from one absolute place to another; relative motion is the change of position of a body from one relative place to another.

## Why is motion relative give an example?

For example, an individual sitting in a plane is at zero speed comparative with the plane, however, is moving at a similar speed as the plane as for the ground. Relative movement is an idea, and its estimation happens with relative speed, relative speed, or relative speed increase.

## Which is true about relative motion?

RELATIVE MOTION An object is only at rest or in motion relative to some reference. A mountain on the earth may be at rest relative to the earth, but it is in motion relative to the sun.

## Is velocity a vector or scalar?

Speed is a scalar quantity – it is the rate of change in the distance travelled by an object, while velocity is a vector quantity – it is the speed of an object in a particular direction.

## What is absolute velocity?

The concept of absolute velocity is mainly used in turbomachinery design and defines the velocity of a fluid particle in relation to the surrounding, stationary environment. Together with the relative velocity (w) and the circumferential speed (u), it forms the velocity triangle.

## What is inertia of a body?

inertia, property of a body by virtue of which it opposes any agency that attempts to put it in motion or, if it is moving, to change the magnitude or direction of its velocity. Inertia is a passive property and does not enable a body to do anything except oppose such active agents as forces and torques.

## What is relative acceleration?

The relative acceleration (also or ) is the acceleration of an object or observer B in the rest frame of another object or observer A. Acceleration of B relative to A is =ab−aa.