The average distance of the earth from the sun is about 1.5 × 10^8 km. Assume that the earth’s orbit around the sun is circular
1 answer:
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1. -23.2 J
The gravitational potential energy of the ball is given by
where
m = 1.1 kg is the mass of the ball
g = 9.8 m/s^2 is the acceleration of gravity
h is the height of the ball, relative to the reference point chosen
In this part of the problem, the reference point is the ceiling. So, the ball is located 2.16 m below the ceiling: therefore, the heigth is
h = -2.16 m
And the gravitational potential energy is
2. 41.1 J
Again, the gravitational potential energy of the ball is given by
In this part of the problem, the reference point is the floor.
The height of the ball relative to the floor is equal to the height of the floor minus the length of the string:
h = 5.97 m - 2.16 m = 3.81 m
And so the gravitational potential energy of the ball relative to the floor is
3. 0 J
As before, the gravitational potential energy of the ball is given by
Here the reference point is a point at the same elevation of the ball.
This means that the heigth of the ball relative to that point is zero:
h = 0 m
And so the gravitational potential energy is
Answer:
The acceleration of the train is 5 m/s².
Explanation:
Acceleration is the change in velocity over a given time interval.
Therefore, acceleration is given as:
Where, are initial and final velocities and
is the time interval.
Here,
This gives,
Therefore, the acceleration of the train is 5 m/s².