# KPK 9th Class Physics Chapter 2 Kinematics Short Questions Answers

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

• Malakand Board 9th Class Physics Chapter 2 Kinematics  short questions Answer
• Mardan Board 9th Class Physics Chapter 2 Kinematics short questions Answer
• Peshawar Board 9th Class Physics Chapter 2 Kinematics short questions Answer
• Swat Board 9th Class Physics Chapter 2 Kinematics short questions Answer
• Dera Ismail Khan Board 9th Class Physics Chapter 2 Kinematics short questions Answer
• Kohat Board 9th Class Physics Chapter 2 Kinematics short questions Answer
• Abbottabad  Board 9th Class Physics Chapter 2 Kinematics short questions Answer
• Bannu Board 9th Class Physics Chapter 2 Kinematics short questions Answer

• All KPK Boards 9th Class  Physics Annual Examination
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## KPK 9th Class Physics Chapter 2 Kinematics Short Questions Answers

Is it possible that displacement is zero but not the distance? Under what condition displacement will be equal to distance?

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.

Does a speedometer measure a car’s speed or velocity?

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.

Is it possible for an object to be acceleration and at rest at the same time? Give example?
Yes it is possible for an object to be acceleration and at rest at the same time.
Example:
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.

Can an object has zero acceleration and non zero velocity at the same time. Give example?

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.
Example:
A truck is moving with constant velocity of 60km/hr in a straight line then truck has non zero velocity and has zero acceleration.

A person standing on a roof of a building through a rubber ball down with a velocity of 8m/sec. what is the acceleration (magnitude and direction) of the ball?

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.

Describe a situation in which the speed of an object is constant while the velocity is not.

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.

Can an object have a northward velocity and a southward acceleration?

Yes, it is possible for an object to velocity in a direction other then the direction of acceleration.
Explanation:
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.

As a freely falling object speed up, air what is happening or stay the same?

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.

A ball is thrown upward with an initial speed of 5m/sec. What will be its speed when it returns to starting point?

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.

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