You drop a rock off the top of a 100 m tall building. How long does it take to hit the ground?
1 answer:
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Answer:
= 308.5 N
Explanation:
acceleration of rocket for safe landing
= initial velocity
=final Velocity
m = mass of rocket
-5.625
Upward force
F - mg = ma
F = ma+ mg
F = m(a+g)
m= mass
a = 5.625
g = 9.8
= 20(5.625 + 9.8
)
= 308.5 N
Answer:
The average kinetic energy of their particles is the same
Explanation:
The temperature of an object/substance is directly related to the average kinetic energy of the particles in the object, according to:
where
is the average kinetic energy of the particles
k is the Boltzmann's constant
T is the temperature of the object
Since k is the constant value, from the equation we see that if two objects of same nature have same temperature T, then the average kinetic energy of their particles, Ek, is the same.