Agun has a muzzle speed of 80 meters per second. what angle of elevation should be used to hit an object 180 meters away? neglect air resistance and use g=9.8m/sec2 as the acceleration of gravity.

the answer must be in radians.

i found: angle=1/2arcsin (180*9.8)/(80^2), but it was not correct.

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone