When looking at the Impulse of an object during a collision, we often use "average force"? When an object hits something, is the
1 answer:
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Responder:
39200 J
Explicación:
Dado:
Masa de Tamara (m) = 50 kg
Altura a la que se encuentra Tamara (h) = 80 m
Aceleración debido a la gravedad (g) = 9.8 m / s²
La energía potencial de un objeto de masa 'm' ubicada a una altura 'h' sobre el suelo se da como:
Ahora, conecte los valores dados y resuelva la energía potencial. Esto da,
Por lo tanto, la energía potencial de Tamara ubicada a una altura de 80 m es 39200 J.
Acceleration is a change in speed and/or direction
Explanation:
The acceleration of an object is defined as the rate of change of velocity, mathematically:
where
is the change in velocity
is the time taken for the velocity of the object to change
We notice that velocity is a vector quantity, so it consists of:
- A magnitude, which is called speed
- A direction
Since acceleration is the rate of change in velocity, this means that the acceleration is non-zero whenever is non-zero, which means that either the speed AND/OR the direction of the velocity is changing.
For instance:
- For an object which is speeding up along a straight line, the speed is changing but the direction is not --> still, the object is accelerating
- For an object moving in a uniform circular motion, the speed is constant while the direction is changing --> still, the object is accelerating
So the correct answer is
a change in speed and/or direction
Learn more about acceleration:
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