Answer:
10.0
Explanation:
Mechanical Advantage = distance moves along the plane/distance moved along the vertical
distance moves along the vertical = 0.3m
distance moves along the plane = 3.0m
Mechanical Advantage = 3.0/0.3
Mechanical Advantage = 10
Hence the mechanical advantage is 10.0
Writing the acceleration as a function of time:
a(t) = 1 + 3√t
Integrating acceleration, we obtain velocity:
v(t) = t + 2(t)^(3/2) + c;
object at rest so velocity at t = 0 is 0 so c = 0.
v(t) = t + 2(t)^(3/2)
Integrating velocity to obtain an equation for displacement:
d(t) = t²/2 + 4/5 t^(5/2) + c
Applying limits from t = 0 to t = 9
d = 9²/2 + 4/5 9^(5/2)
d = 234.9 m
The answer is b. According to the law of conservation of energy, energy can never be created nor destroyed, only transferred from one form to another.
