Una particula en movimiento aumenta su velocidad e 10cm/s a 20 cm/s en 5 seg. clcular acceleracion
1 answer:
The acceleration of the particle is
Explanation:
The acceleration of a body is defined as follows:
where
u is the initial velocity of the object
v is the final velocity
t is the time the object takes to change its velocity from u to v
For the particle in this problem, we have:
u = 10 cm/s
v = 20 cm/s
t = 5 s
Substituting into the equation, we find the acceleration:
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Answer:
Explanation:
The bike's acceleration can be found by using the following suvat equation:
where
v is the final velocity of the bike
u is the initial velocity
a is the acceleration
s is the distance covered
For the bike in the problem,
u = 0
v = 7 m/s
d = 40 m
Solving the equation for a, we find the acceleration:
The mass of ball a is twice the mass of ball b:
This means that the initial potential energy of ball a (
) is twice the potential energy of ball b (
):
When the two balls reach the ground, the potential energy of each ball has converted into kinetic energy (since now their altitude is h=0), because the total mechanical energy of each ball must be conserved. Therefore:
and so the kinetic energy of ball a must be twice the kinetic energy of ball b:
This means that the initial potential energy of ball a (
When the two balls reach the ground, the potential energy of each ball has converted into kinetic energy (since now their altitude is h=0), because the total mechanical energy of each ball must be conserved. Therefore:
and so the kinetic energy of ball a must be twice the kinetic energy of ball b: