5. Which of the folowing statements about the energy ofa pendulum is true?
1 answer:
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Answer:
a) t=0.9935s
b) d = 6.95m
c) Hmax=2.1m
d) Vf = (9.009,-6.48) m/s
Explanation:
First of all, the we calculate the components of the initial velocity:
For the time of the jump:
Solving the quadratic equation for t, we get:
t = 0.9935s
For the distance of her impact, we will need the time we just calculated:
To know the maximum height:
Using this value, we calculate the maximum height:
Finally, for the final velocity, we use the time of the jump t=0.9935s:
Gravitational force of earth is given as weight of object
so here we know that gravitational force on Amy is 500 N
so we will have
now we will have
now from above equation we will have
so the mass of the Amy is 51 kg
Answer:
a. at either A or B
Explanation:
Kinetic energy may be defined as the energy of the system or an object which is due to its velocity of the object it possess.
In the context, an object having mass is attached to spring which is vertical and the object moves up and down due to spring effect between points A and B. Now these points A and B are the extreme points after which the object bounces back.
At point A and B, the velocity of the object becomes zero and hence the kinetic energy of a body varies directly proportional to its velocity.
i.e. Kinetic energy