If you take a look at the definition of work, you will get this formula:
Answer:
Explanation:
Given
speed of ball 
launch angle 
Range of a Projectile 
Range will be common for two angles i.e. ![\theta [tex] and [tex]90-\theta](https://tex.z-dn.net/?f=%5Ctheta%20%5Btex%5D%20and%20%5Btex%5D90-%5Ctheta%20)
for 

For 



The answer to this question is True.
Answer:
Using 3 periods to get an accurate reading:
3T = (6.40 S - 0.90 s) = 5.50 S So, T = 1.83 s
m = 0.250 kg
Using algebra:
k=
=
=2.95kg/sec