1. Basicallykinematics is the study of motion without considering the connecting forces. Itis used along with dynamics to calculate velocities, masses, momentum andenergy during collisions. Kinematics deals with any motion of any objectwithout considering the mass of each or the forces that caused the motion(Brent, 2013).
2. Distanceis the length of the total path covered by a body in motion. Distance simplymeans how far one point is from the other point or how far you have moved fromone position to the next. A scalar quantity is a one dimensionalmeasurement of a quantity and distance falls under this category.
Distanceequals speed by time (Weidner, 1989).3. Displacementis a vector quantity meaning that it has more than one number associatedwith it. A vector is a quantity that requires both magnitude and direction. Displacementis the shortest distance between the initial and the final position.
It is thevector value of how far an object has been displaced; meaning how far is itfrom where it started. Displacement= (final position) – (initial position) = change in position. (Walden,2015).4.
Distinguishbetween distance and displacement – As mentioned before, distance is a scalarquantity and displacement is a vector quantity. At first I was a bit confusedwith what the difference is because both are so similar, however, in fact, theyare quite different. Distance is a scalar quantity thatrefers to how much an object has covered during its motion as opposed todisplacement which is a vector quantity thatrefers to how far out of place an object is, that is the object’s overallchange in position (Duncan, 1985).5. Speedis the distance travels per unit time, or the rate of change of distance withrespect to time.
Speed is a measure of how quickly an object moves from oneplace to another. It is equal to the distance traveled divided by thetime. Speed equals to distance divided by time (Weidner, 1989). 6. Velocity isa vector quantity thatrefers to the rate at which an object changes its position so when evaluatingthe velocity of an object, one must keep track of direction. The velocity of anobject is its speed in a particular direction (Duncan, 1985). Velocity can alsobe defined as rate of change of displacement or just as the rate ofdisplacement. Velocity is called a vector quantity because it involves bothspeed and total displacement of the body from one time to another.
The equation or formula for velocity is similar to speed. To figure out velocity, you divide the distance by the time it takes to travelthat same distance, then you add your direction to it (Walden, 2015).7. Distinguishbetween speed and velocity: Velocity is a vector quantity of a moving body isits rate of displacement with respect to time.
Speed is a scalar quantityand is distance traveled per unit time. Speed is a steady speed, neitherspeeding up not slowing down; velocity is constant speed and constant direction(Brent, 2013). 8. Acceleration is the rate at whichthe velocity of an object changes. Basically, if an object is speeding up per agiven unit of time, it is said to be accelerating. For example, If acar drives at a speed of 2 miles/hour in 1 second, then 4 miles/hour in anothersecond, then 6 miles/hour in the 3rd second, then the car is accelerating at aconstant pace every second, it goes at a speed that is 2 miles/hour faster thanthe previous second.
This is acceleration.Acceleration is the change in the velocity, divided by the time (Duncan,1985). 9. Accelerationdue to gravity – the acceleration which is gained by an objectbecause of gravitational force is called its acceleration due to gravity.Gravity always acts vertically downwards on an object.
Now if an object ismoving downwards gravity acts downwards on it as it should be and so gravity isconsidered positive. Again if an object is moving upwards, the object actsagainst gravity rather which is opposite to the usual, where gravity should acton the object but this time the object is acting against gravity and so gravityis considered to be negative (Weidner, 1989)10. Distinguishbetween freefall and non freefall – In Newtonian physics, free fall is anymotion of a body where gravity is the only force acting upon it. A body in freefall has no force acting on it and it is only moving up and down and hence inthis case fall doesn’t only mean downwards. Free fall when an object fallsdownward it experiences force of gravity. Non-free fall is when there is no airresistance. During free fall, other forces like air resistance, which isthe friction due to air, do not affect the object’s motion. Example f afreefall based on the definition would be a ball falling in a vacuum and a nonfree fall example would be a ball falling through air (Walden, 2015).
11. Accelerationof a freefalling object – Something is in free fall if gravity is the onlyforce acting on it. Acceleration in free fall is the rate of fall of an object.It is measured by the force divided by mass of the object. Acceleration in freefalls occurs when no other force acts on the falling body except gravity(Duncan, 1985). ReferencesBrent,M.
(2013, November). Introductory Physics I. Retrieved January 16, 2018, fromhttps://www.bing.com/ 2fintro_physics_1.pdfDuncan, T.
, & O?nac?, D. T. (1985). Physics for the Caribbean: a CXCcourse (2nd