What is a Projectile?
A projectile is an object on which only force acting is gravitational. In
An object which is thrown vertically upwards is also a projectile (provided that the effect of air resistance is negligible). And an object that is thrown upwards from the horizontal angle, it is also a projectile (provided that the effect of air resistance is negligible).
A projectile is
According to the definition, a projectile has a single force which acts on it – the gravitational force. If any other force was acting on something, then that object is not projective. Thus, the free-body diagram of a projectile will show the force of a single force downwards and the force of gravity (or simply Fgrav).
Even if a projectile is downward, upwards, upstream and right, or downwards and on the left side, nevertheless the free-body diagram of the projectile is shown in the picture.
According to the definition, a projectile is any object on which the only force is gravitational.
Many students have difficulty with the concept that the only force to work on the projectile that moves upward is gravity. Their concept of motion inspires them to think that if an object is moving upward, then there should be an upward force. And if any object is moving upwards and on the right, then there should be both an upward and right power.
His perception is that force causes force; And if the speed is upwards then the force should be upwards. They say, ” How can any object in the world grow upwards like trees?” Such students do not have trust in Newtonian physics (or at least Newton does not steady believe in physics). Newton’s rules show that the forces should be the cause of only one acceleration (not speed).
Newton’s laws were directly opposed to a common misconception that requiring a force to keep an object in motion. This idea is not only true! No need for force to keep an object in motion. Only strength is needed to maintain acceleration.
And in the case of a projectile which is moving upwards, there is the force on the downside and the acceleration at the bottom. That is, the object is moving upwards and slows down.
To carry forward this concept of further power and consider acceleration downward for a projectile, a cannon ball shoots horizontally with a very high rock at a high speed. And for a moment, suppose that the gravitational switch can be switched off that the cannon ball travels in the absence of gravity? What will be the speed of such an artillery?
How can its speed be described? According to Newton’s first law of motion, such a cannon ball will continue in motion in a straight line at constant speed. If action is not taken by an unbalanced force, then “one object in motion …” will be. This is Newton’s law of inertia.
Now assume that the gravity switch is on and the cannonball is projected horizontally from the top of the same rock. How will gravity affect the speed of the cannonball? Will gravity affect the horizontal motion of the cannon?
Will the cannonball set a horizontal distance of more distance (or less) due to the effect of gravity? Answer these two questions “No!” Gravity will work downwards on the cannonball to affect its vertical motion.
Gravity causes a vertical acceleration. The ball will stand directly under its otherwise straight line, inertial path. Gravity is a downstream force on a projectile which affects its vertical motion and causes the parabolic trajectory, which is a feature of projectile.
A projectile is an object on which the only force is gravitational. Gravity works to affect the vertical motion of the projectile, thus causing a vertical acceleration. The horizontal speed of the projectile is the result of the tendency of any object in motion to stay in motion in constant velocity.
Due to the not being present of horizontal forces, a projectile left in motion with a not varying horizontal velocity. Horizontal forces are not required to keep a projectile horizontally. The merely force acting on a projectile is gravity!
Written By Piyush Som