10 example of projectile motion
Answers
Answer:
The first important area which comes to mind is ball games and sports. Footballs are heavy enough to follow a nearly parabolic trajectory, without spin, with the effect of spin often being spectacular. Footballers have to develop a feel for such trajectories.
A cricket ball is small and dense enough to follow a nearly parabolic path, and it is up to the batsman to judge this, in playing his shot. But, the extraordinary thing is that a cricket ball can swing in the air, when bowled in a certain way, making the batsman’s job much more difficult. The parabolic trajectory of the ball is also very important when a fielder tries to catch a very high, long ball, on the boundary. The fielder must firstly get himself into the same plane as the flight, and then needs to judge where to place himself. The symmetry of the flight means that when it comes down to a catchable height, it will be moving at the same speed that it left the bat! That could be 100mph! The fielder has plenty of time to think about this. Getting a feel for parabolic flight is essential.
With tennis and table tennis, the constant use of spin, even with lob shots, makes parabolic trajectories less important. This is also true in games such as golf, where spin predominates, and in rugby, where the shape of the ball affects its motion.
Scoring from distance in basketball is an example of the pure judgement of parabolic flight, and can only be mastered by constant practice.
Just playing a game of catch, in the garden, requires a developing ability to predict the parabolic flight of a ball, at low speeds. This is not as easy as it sounds, and some people are a lot better at it than others.
Another general and important area which is to do with projectile motion, is projectile weapons, of which there are and have been many. For instance, arrows and thrown spears are projectile weapons, where the angle of projection which gives the maximum range, may be vital. For pure projectile motion, this angle is 45°.
A bullet from a pistol is a projectile. If this is shot horizontally, with a typical muzzle velocity of 400 m/s, it would take 0.25 s to hit a target placed 100 m away. In this time, it would fall a distance of 1/2x10x(0.25)², which is 0.31 m, or 31cm. This would have to be allowed for, during aiming. At 200m, the bullet would fall by 1.25m!
We still use many ballistic weapons, where projectiles follow a parabolic path. The best historical example is the canon, which has been superseded by the field gun. We also still use mortars, and ballistic missiles, although most missiles, nowadays, are jet powered and electronically guided. The simple grenade is a projectile weapon, although RPG’s are becoming more and more common.
Projectile motion is also important in many athletic events, gymnastics and extreme sports, such as skateboarding, snowboarding, ski jumping, BMX riding and so on - any sport where the body or the support leaves the ground at speed - so, figure skating would also qualify.
There are the obvious throwing events, such as javelin, shot put and hammer, where there is obviously pure projectile motion, but this is also the case in jumping events, where the center of mass of the body follows a purely parabolic trajectory after take off. It’s up to the athletes and their coaches to make these parabolas as long or as high as possible. Gymnasts, on floor, beam, bars or vault need to learn how to control the ballistic movement of their bodies, under the highly complex series of forces which they apply to them. This often looks like poetry in motion. This is also true of extreme sports, where people can produce highly complex bodily motions as they move ballisically through the air.
Fundamentally, we can say that whenever anything moves freely, without support, we have an example of projectile motion, and there are many that I haven’t mentioned, but perhaps I ought to end with satellites and space stations. These orbit the earth in circles, but they are still in constant freefall, and they are still technically projectiles, and an example of projectile motion.
Explanation:
Answer:
A motion is defined as Projectile motion when an object is projected near Earth's surface, and follows a curved path only under the influence of earth's gravity. Following are the various examples of Projectile motion.
Explanation:
i) When a missile is launched, it travels in a projectile motion until escaping earth's gravitational pull.
ii) When a cannon fires, the bomb follows projectile motion.
iii) While playing catch with ball, players throw balls to each other in projectile motions.
iv) In basketball, the ball is shot in the hoop by the players in projectile motion.
v) In sports like javelin and shot put, the objects are thrown with full force in projectile motion.
vi) A bullet is fired from gun in a projectile motion.
vii) In the game of tennis, when a player hits the ball over net onto the other side, it follows projectile motion.
viii) In weapons like bow and arrow & spears, the weapon follows projectile motion.
ix) In the game of golf, the players need to have a good knowledge of projectile motion as all the shots are projectile motions.
x) While watering plants with a hose, we can observe projectile motion of water stream.
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