The initial mechanical energy is the potential energy (PE) which can be solved through the equation,
PE = mgh = (40 kg)(9.8 m/s²)(12 m) = 4,704 J
The energy at the bottom is the kinetic energy and can be calculated through the equation,
KE = 0.5mv² = (0.5)(40 kg)(10 m/s)² = 2000 J
Therefore, she lost 2,704 J of energy due to friction
Answer:
False
Explanation:
It is a vector because of the acceleration being a vector. F=ma.
Answer:
C 0.85 j/g*k
Explanation:
The specific heat capacity of a material is given by:
where
Q is the amount of heat supplied to the object
m is the mass of the object
is the increase in temperature of the object
For the object in this problem, we have
m = 117 g is the mass
Q = 1200 J is the heat supplied
is the increase in temperature
Substituting into the formula, we find the specific heat:
Hi there!
We can begin by solving for the pendulum's velocity at the bottom of its trajectory using the work-energy theorem.
Recall:
Initially, we just have Potential Energy. At the bottom, there is just Kinetic Energy.
Working equation:
Rearrange to solve for velocity:
Now, we can do a summation of forces:
The net force is the centripetal force, so:
Rearrange to solve for tension:
Explanation:
To determine whether something is living or nonliving, a living thing must meet seven specific characteristics: feeding, movement, respiration, excretion, growth, sensitivity, and reproduction. A living organism needs to be able to feed to make energy and grow.
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Miss Hawaii