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How does friction affect a javelin throw?
The forward horizontal force made on the ground through friction (dragging) will make the ground exert, by reaction, a backward reaction force on the foot (see figure 2). The downward vertical force made on the ground by the foot will make the ground exert an upward ground reaction force on the foot.
What type of motion is javelin throw?
Throwing of a javelin is an example of projectile motion.
What is summation of forces in javelin?
The mechanics of delivering the javelin are a summation of forces that begin from the ground and work up the body as energy is transferred from one body part to the next and ultimately into the spear. The analogy of “cracking a whip” is very descriptive of the action of the throw.
How is friction used in javelin?
Sliding Friction- Occurs when the Javelin goes through the air, and the air creates friction. Fluid friction also acts on the thrower as he or she runs.
What is friction in PE?
Friction can be defined as the resistance to motion of two moving objects or surfaces that touch. Friction plays a very important role in many sports, such as bowling and curling. There is both Static Friction and Kinetic Friction.
What are the phases of movement in the javelin?
There are 3 phases to throwing a javelin. There is the approach phase, the withdrawal phase, and the final delivery. The goal of these phases is to increase total velocity of the javelin.
How does gravity affect javelin?
Force of gravity acts on the initial vertical velocity of the javelin, reducing the velocity until it equals zero. A vertical velocity of zero represents the apex of the trajectory, meaning that the projectile has reached its max height.
How does a javelin throw work?
Javelin throwing involves a spearlike implement that is hurled with an over-the-shoulder motion at the… After a short run, the javelin is thrown directly forward with an over-the-shoulder motion into a 29° sector marked on the field. It must land point first.
How is friction used in netball?
In Netball, friction is a beneficial force. Friction prevents netball players slipping, sliding and stepping, if a player does step then the other team will get the ball so this is a big component in a game.