With volleyball, jumping is a key component to the sport. A hitter must be able to jump to reach the ball and hit it. Physics also applies to jumping. As a player jumps, the player is traveling up into the air for a certain amount of time until it hits their maximum height, and then comes down at the same velocity as they traveled upwards. Due to gravity, as the player jumps upward, gravity is acting upon its and pulling them downward at 9.81 m/s^2. Also, Newton's Third Law is also used in a players jump. Newton's 3rd Law states that all forces come in pairs and that object 1 and 2 exert identical forces on each other. As the player pushes down to jump, the ground pushes upwards with the same force that the player had applied.