What is the acceleration if you throw a ball down?
9.8m/s
Basically, the same principles of gravity and relative motion can be observed when a ball is thrown or dropped. all 3 are similar in that no matter how the ball is thrown or dropped, there is always an acceleration of 9.8m/s downward.
What happens to velocity when a ball is thrown down?
Acceleration from gravity is always constant and downward, but the direction and magnitude of velocity change. At the highest point in its trajectory, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth (see figure 1).
Is acceleration of free fall positive or negative?
(2) The free-fall acceleration is negative—that is, downward on the y axis, toward Earth’s center—and so it has the value -g in the equations. The free-fall acceleration near Earth’s surface is a = -g = -9.8 m/s2, and the magnitude of the acceleration is g = 9.8 m/s2. Do not substitute -9.8 m/s2 for g.
Why do both balls hit the ground at the same time?
Gravity is the force that causes things to fall to earth. Gravity causes everything to fall at the same speed. This is why balls that weigh different amounts hit the ground at the same time.
What happens when a ball is thrown straight up?
Free Fall: A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?
What happens to an object in free fall when it is thrown?
When the object has left contact with whatever held or threw it, the object is in free fall. When the object is thrown, it has the same initial speed in free fall as it did before it was released. When the object comes in contact with the ground or any other object, it is no longer in free fall and its acceleration of g is no longer valid.
What determines the speed at which a dropped ball falls?
Its y-axis velocity, the speed at which it moves downwards, is determined purely by gravity, just as in the case of the dropped ball, as none of the throwing force is directed downwards. Both the balls have the same velocity along the y-axis and therefore should reach the ground at the same time.
Why is the time of fall the same for throwing a ball?
In both cases the value of displacement will be the same, and the initial velocity in the vertical direction will also be the same (= 0) (take vertical component in case of a ball thrown sideways). That’s why the time of fall would be the same.