Anita

__**Sheet 1:**__ **It's all relative sheet** Time=distance/time =360/28-10 =360/18  =20seconds. Time=distance/time
 * a) I** f the car is travelling at a speed of 100 km h-1 (28 m s-'),it take to catch up to the cyclist //20seconds//.
 * b) ** The time taken can be caculated using the formula:

__**Sheet 2:**__ **Relative motion** 100km/hr-60km/hr =40km/hr west Therefore: "C" is relative to "D"
 * Question 1: **

The volicity of "x" relative to "y" is: 27.78km/hr x 2= 55.56km/hr -Both are at same velocity
 * Question 2: **

The velocity of the second car relative to the first: 25km/hr south - 30.5km/hr north =-5.5km/hr west
 * Question 3: **

The realtive velocity of the fielder to a cricket ball 5ms-1 - 12ms-1 =-7ms-1 =7 ms-1 south time=distance/speed 0.05/100 =0.005sec No, you can't overtake the other car
 * Qeustion 4: **
 * Question 5: **

__**Newton's Biography**__**:** //Newton's contribution to physics//


 * Newton applied his binomial theorem to infinite series and from there developed calculus, a revolutionary new form of mathematics.
 * Developed Analytical geometry and prism theory
 * Formulated the three laws of motion which describe classical mechanics
 * Proposed the theory of universal gravitation which explains that all bodies are affected by the force called gravity.
 * Newton showed that the motions of objects on Earth and of celestial bodies are governed by the same set of natural laws, by demonstrating the consistency between "Kepler's laws of planetary motion" and his theory of gravitation.
 * His discoveries about light and movement of planets were used to make space exploration such as the first flights to the moon possible.

__**Newton's universal Law of Gravitation:**__ //The Law & Formula, Importance of this law//

m=masses of the two objects r=straight line distance between the centre of the two objects --> Likewise, as the product decreases so does the gravitational force --> Therefore, as the distance increases, the gravitational force decreases (vice versa)
 * Newton's universal law of Gravity states that: The force of gravity between two objects is equal to the universal gravitational constant multiplied by the mass of the two objects all divied by the sqaure of the distance between the two objects.
 * The Gravitational force is proportional to the product of their masses therefore as product increases so does the gravitational force.
 * The Gravitational force is inversely proportional to the square of the distance.