relative_motion ppt about physics grade 10

It helps you in studying physics

1. Relative Motion

2. Relative Motion refers to the motion or speed of any object in respect to a particular point. Relative motion is the description of movement of one object referenced to another, which is treated as fixed. If I view the night sky from my position, the stars and planets appear to move in a circle. That motion is “relative” to my position. Someone viewing me from a place in space during that same night would see my position rotating around the axis of the Earth.

3. Velocity measurements differ in different frames of reference

4. Relative Velocity The relative velocity of an object  A  with respect to object  B  is the rate of change of position of the object A with respect to object B. If V A  and V B  be the velocities of objects A and B with respect to the ground, then The relative velocity of A with respect to B is V AB  = V A  – V B The relative velocity of B with respect to A is V BA  = V B  – V A

5. Calculate relative velocity Case 1: calculate the difference in velocity v fs = v fe − v se Ex: If you are moving at 80 km/h north and a car passes you going 90 km/h, find the velocity of the fast car relative to slow one

6. A passenger at the rear of a train traveling at 15 m/s relative to Earth throws a baseball with a speed of 15 m/s in the direction opposite the motion of the train. What is the velocity of the baseball relative to Earth as it leaves the thrower’s hand

7. Case 2: calculate velocity and direction A boat heading north crosses a wide river with a velocity of 10.00 km/h relative to the water. The river has a uniform velocity of 5.00 km/h due east. Determine the boat’s velocity with respect to an observer on shore. Given: v bw = 10.00 km/h due north (velocity of the boat, b, with respect to the water, w) v we = 5.00 km/h due east (velocity of the water, w, with respect to Earth, e) Unknown: v be = ?

8. 1-Which of the following is a coordinate system for specifying the precise location of objects in space? x-axis frame of reference y-axis diagram 2-The term relative motion simply means_________ the motion of an object relative to another object how motion is related to vision the term does not apply to physics 3. Observers using a different ___________________ may measure different velocities for an object in motion frame of reference relatives of motion projectile motions constant velocity