Is a rate at which body moves and takes no account of direction

DPTIs a rate at which body moves and takes no account of direction

1. KINISIOLOGY DPT

2. SPEED Is a rate at which body moves and takes no account of direction. EXAMPLE: If a car is moving from speed of 60 kilometers an hour. Speed is uniform if car travels in same direction. If car is slow down and then increases, its speed is variable.

3. TYPES OF SPEED ACCORDING TO MOVEMENTS. Speed of relaxed passive movement. Speed of active exercise. Reduced speed. Increased speed.

4. VELOCITY Notion of velocity incorporates not only the rate of motion but also the direction. Example: Aeroplane travels at 1000kilometers an hour in an easterly direction. A change in either speed or direction is said to alter the velocity.

5. WORK is defined as product of force and distance through which force acts. It is measured in JOULES or ERGS.

6. ENERGY Is defined as the capacity of a body for doing work.

7. TYPES OF ENERGY

8. POWER Is a rate of doing work OR Rate of energy expenditure. It is measured in joules per second or ergs per second.

9. ACCELERATION Is a rate of change of velocity. A positive acceleration causes an increase in velocity. A deceleration or retardation is a decrease in velocity. Movement under gravity.

10. MOMENTUM Is defined as the quantity of motion. It is represented by the product of mass and velocity. The force responsible for the momentum will generate movement slowly in a relative heavy body and more rapidly in lighter body.

11. INERTIA Is defined as the resistance of a body to any change in its state of rest and motion. OR Is defined as the reversed effective force of a body. A body at rest tends to remain at rest indefinitely while a moving body tends to continue moving at constant speed and in straight line unless acted upon by a force. Example: A railway truck in a goods yard.

12. FRICTION Is a force which opposes motion when one surface slides upon another. Example: rubber. TYPE DYNAMIC FRICTION.

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