My answer is D but I will still try to word it out again
Answer:
Explanation:
l = 600mm = 0.6m
d = 40mm = 0.04m
hd = 30mm = 0.03m (diameter of the hole)
hl = 100mm = 0.1m (hole length)
modulus of elasticity for the aluminium = 85GN/m2
compressive load = 180kN
Answer:
m = 7.48 kg
Explanation:
force (f) = 11,500 N
length of barrel (s) = 1.7 m
angle above the ground = 49.3 degrees
acceleration due to gravity (g) = 9.8 m/s^{2}
initial velocity (u) = 0 m/s
final velocity (v) = 72.3 m/s
mass (m) = ?
force = mass (m) x acceleration (a)
acceleration (a) = force / mass (m)
acceleration (a) = 11500 / m
applying the equation of motion
, we can get the mass

5227.3 = 0 + 
m = 
m = 7.48 kg