KPK 9th Class Physics Chapter 2 Kinematics Short Questions with answers are combined for all 9th class(Matric/ssc) Level students.Here You can prepare all Physics Chapter 2 Kinematics short question in unique way and also attempt quiz related to this chapter.Just Click on Short Question and below Answer automatically shown. After each question you can give like/dislike to tell other students how its useful for each.
Class/Subject: 9th Class Physics
Chapter Name: Kinematics
Board: All KPK Boards
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KPK 9th Class Physics Chapter 2 Kinematics Short Questions Answers
Yes, it is possible that displacement is zero but the distance is not equal to zero. When a body moves from. Initial “A” and covering some distance and comes back to initial point then body does not covers a displacement i.e. displacement is equal to zero but distance is covered and cannot be equal to zero.
When a body is moving in a straight line then displacement will be equal to distance.
Speed is a scalar quantity. It has only magnitude. Therefore speedometer of car measures the speed of the car which is measured in kilometer per hour. Speedometer does not show any direction while velocity is a vector quantity. It has magnitude as well as direction.
When a body is thrown vertically upward its acceleration is due to gravity, which is constant and its value is (-10m/sec2) for moment body will stop and comes back in downward direction with n acceleration of ( g =+10m/sec2). During its flight the acceleration does not change at any time during upward and downward motion but velocity is zero at maximum height.
Yes it is possible for an object to have zero acceleration with non zero velocity.
Acceleration is produced due to either change in speed of body or direction or both.
It is possible for an object to move with constant speed in the same dirction. In the situation acceleration is zero and velocity is non zero.
A truck is moving with constant velocity of 60km/hr in a straight line then truck has non zero velocity and has zero acceleration.
When a person throws a ball with a velocity of 8m/sec then the magnitude of acceleration will be (+9.8m/sec2).
And this acceleration is constant throughout the fight this acceleration is called free fall acceleration and its direction is vertically downward.
When a body is moving in a circle path with a constant speed then its velocity is not constant, because direction of velocity change at every instant. Therefore we can say that when a body is moving in a circle path then speed may be constant while velocity is not constant.
Example: Motion of motorcyclist in death-well game, motion of moon around the sun.
Yes, it is possible for an object to velocity in a direction other then the direction of acceleration.
When a body is thrown vertically upward, then the velocity of the body is in upward directly while the acceleration due to gravity is downward direction.
According to Galileo in the absence of air resistance, acceleration of freely falling objects remains constant throughout the motion while velocity of the body increases continuously at the rate of 9.8m/sec2.
In the presence of air resistance the acceleration decreases.
Thus during free fall motion we take g= 9.8m/sec2 as a constant value for free fall objects.
When ball is thrown vertically upward with an initial speed of 5m/sec then its final speed “vf” will also be 5m/sec when it returns to its starting point. Because in the absence of air resistance there is no effect on the speed of ball.