Question 3)

1) Write the difference between gravitational force and weight.

2) Consider a projectile thrown with velocity it making an angle q with the horizontal axis.

Show that:

1. Time of Flight: T = 2u sinq /g
2. Horizontal Base: R = u² sin2q/g

Question 3.1) When we place two objects in space separated by a distance from each other, the interaction between these objects can be a force of attraction or repulsion which is known as the force of gravitation and it is mathematically calculated by using Newton's laws of gravitational force.

The weight of an object is simply the gravitational force that the earth exerts on any object placed on it surface.

Mathematically, W =mg

W is the weight

m is the mass of the object of the earth surface

g is the acceleration due to gravity

Question 3ii

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