Physics quiz! 1) a projectile has a vertical component and a horizontal component. true false 2) the shape of a projectile's trajectory is an ellipse. true false 3) during the course of trajectory, the horizontal component of the velocity is a) constant b) increasing c) decreasing d) negative

1.

True

Explanation: A projectile is launched at certain angle with the horizontal. Hence, its equation of motion can be described using vertical and horizontal components. Therefore, the statement is true.

2.

False

Explanation:

The shape of the trajectory of a projectile is parabola. Hence, the given statement is false.

3.

A) constant

Explanation: During the course of trajectory, the horizontal component of the velocity is constant. There is no external force acting in the horizontal direction. In the vertical direction,  acceleration due to gravity acts which increases the vertical component of velocity. Hence, the correct option is A.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force