Answer:B
Explanation:i took the test believe me
Answer: a) 24.2 rad/s² b) 6.95 rad/s
Explanation:
So the cylinder's moment of inertia is , where M is the mass of the cylinder and R is its radius.
The problem you have here is that the axle is modifying it, so we use the parallel axis theorem:
Therefore
where D is the distance from the center of mass to the axis which is a radius R
Next the Momentum with respect to the center of mass of the cylinder is
because there are no other forces rather than the cylinder's weight, now kg*m^2
a ) replace and find
b) we start by assuming that the energy is conserved because the cylinder is rolling without sliding:
so the potential energy is given by
now you have that the same amount is going to be equal to the kinetic rotational energy of the cylinder so
Answer:
2×10⁷ bulbs.
Explanation:
From the question,
The the power generated by the water flows over a Niagara section is given as,
P = M'gh......................... Equation 1
Where M' = Fall rate, g = acceleration due to gravity, h = height of fall.
Given: M' = 1.31×10⁶ kg/s, g = 9.8 m/s², h = 71 m
Substitute into equation 1
P = 1.31×10⁶×9.8×71
P = 9.115×10⁸ W.
Number of 40 W bulb it can lit = P/40
= 9.115×10⁸/40 = 2.27×10⁷ ≈ 2×10⁷ bulbs.
Answer:
0.2
Explanation:
Mechanical Advantage is defined as the ratio of force output with respect to the force input. Thus,
MA = output / input
MA = 5 / 25
MA = 1/5
MA = 0.2
Since this value is less then one. Even though it's tagged a mechanical advantage, in reality it would be mechanical disadvantage.
Therefore, we can say that the mechanical advantage of the baseball bat is 0.2