Define the following : (i) Average speed (ii) Acceleration (iii) momentum (iv) Inertia (v) acceleration due to gravity
Answers
Answer:
1. In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position; it is thus a scalar quantity.
SI unit: m/s, m s−1
Dimension: L T−1
2. Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
3. In Newtonian mechanics, linear momentum, translational momentum, or simply momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.
SI unit: kilogram meter per second kg⋅m/s
Other units: slug⋅ft/s
Common symbols: p, p
Dimension: MLT−1
4. Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.
5. The gravity of Earth, denoted by g, is the net acceleration that is imparted to objects due to the combined effect of gravitation and the centrifugal force. In SI units this acceleration is measured in metres per second squared or equivalently in newtons per kilogram.
Answer:
plz mark me as brainlist
Explanation:
Average speed :The speed of an object is found out by dividing the distance that the object covers by the time in which the object takes to cover this distance. If 'D' is the distance traveled in some time 'T' then the speed of the object for this journey or 's' is equal to s = D/T. This is the simplest case.
Acceleration: In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities (in that they have magnitude and direction). The orientation of an object' acceleration is given by the orientation of the net force acting on that object.
momentum: Momentum is a physics term; it refers to the quantity of motion that an object has. A sports team that is on the move has the momentum. If an object is in motion (on the move) then it has momentum.\
Inertia :Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.
acceleration due to gravity :Acceleration due to gravity is the acceleration gained by an object due to gravitational force. Its SI unit is m/s2. ... The standard value of g on the surface of the earth at sea level is 9.8 m/s2.
Formula: g = GM/r2
Dimensional Formula: M0L1T-2
Values of g in SI: 9.806 ms-2