It takes 4 seconds for the rock to return to its original launch location after being hurled.
The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t).
The amount of time an object spends in the air after taking off is known as its time of flight.
The mathematical formula for time of flight is T = 2Usin(theta)/g, where U is the beginning velocity of the object, which is equal to 19.6m/s.
angle theta = 90° between the item being launched and the ground (since the body is thrown vertically upward)
g = 9.8 m/s2 is the acceleration caused by gravity.
When these values are used in the formula above, we get;
T = 2(19.6)sin90°/9.8
T = 2(19.6)(1)/9.8
T = 4seconds
As a result, it takes 4 seconds for the rock to return to its original launch location after being hurled.
To know more about acceleration visit:-
https://brainly.com/question/2303856
#SPJ4
