Ashell is fired from the ground with an initial speed of 1.51 ✕ 10^3 m/s at an initial angle of 32° to the horizontal. (a) neglecting air resistance, find the shell's horizontal range. m (b) find the amount of time the shell is in motion.

Explanation:

Given that,

Initial speed of the shell,

Angle of projection,

(a) The range of a projectile is given by :

R = 209116.35 meters

(b) Let t is the amount of time the shell is in motion. It can be calculated as :

Here, d = R

t = 138.48 seconds

Hence, this is the required solution.

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.