Answer:
4km
Explanation:
15 minutes is 1/4 of an hour.
1/4 of 16 is 4.
in the same direction as the displacement vector and the motion
Answer:
79.2 m/s
Explanation:
θ = angle at which projectile is launched = 29.7 deg
a = initial speed of launch = 130 m/s
Consider the motion along the vertical direction
v₀ = initial velocity along the vertical direction = a Sinθ = 130 Sin29.7 = 64.4 m/s
y = vertical displacement = - 108 m
a = acceleration = - 9.8 m/s²
v = final speed as it strikes the ground
Using the kinematics equation
v² = v₀² + 2 a y
v² = 64.4² + 2 (-9.8) (-108)
v = 79.2 m/s
Answer: 480 kJ
Explanation: Energy = power · time
E = Pt = 4000 W · 120 s = 480 000 J