In what direction is the net force exerted on the moon?
We know from Newton’s second law of motion that an object experiencing a net force undergoes acceleration. In the case of the moon orbiting the Earth (or any object orbiting another object to which it is attracted by some force), the net force on the moon is always directed toward the Earth.
What is the kinetic energy of a satellite of mass m that orbits?
However the total energy INPUT required to put a satellite into an orbit of radius r around a planet of mass M and radius R is therefore the sum of the gravitational potential energy (GMm[1/R-1/r]) and the kinetic energy of the satellite ( ½GMm/r).
Is there a net force acting on the moon?
b) There is no net force acting on the moon.
Can you move with constant speed and not constant velocity?
No, it doesn’t. Velocity is a vectorial quantity, it has magnitude (speed) and direction. Even though the speed is constant in this particular example, the direction changes all the time. The velocity of an object changes when the net force acting on it is not zero.
Which string is most likely to break?
A) The upper string is most likely to break and has more tension due to the force of your pull as well as the weight of the ball. Weight is more important because it determines how much tension is being put on the upper string.
Is the string tension greater in the upper or the lower?
A: Upper string because it supports the weight of the ball in addition to your pull. The lower string supports only your pull. The upper string is more likely to break.
Why is it that a sudden increase in the downward force breaks the lower string and a slow continuous increase in the downward force breaks the string above the massive ball *?
Why wil a slow continuous increase in downward force break the string above the massive ball, whereas a sudden increase in downward force breaks the lower string? So the total tension in the top string is pull plus the weight of the ball. The top string breaks when the breaking point is reached.
Under what condition will a string break?
Acceleration is defined as positive in the downward direction. If you are accelerating down much less than the acceleration due to gravity, the tension on the bottom string is much less than the tension of the top string*. Because the tension is greater at the top, that string will break first.
What happens if there is no tension on object like a rope or a string?
if there is no tension on object like a rope or a string ,they will not be straight and will bend because tension act along the direction of the string . tension is present only if an object is stretched and therefore has no tension ,you can change the direction of the force by changing the direction of string .
Which thread will break first?
When you pull slowly on the lower piece of cotton, the tension in the upper piece of cotton will always be more than the lower one, because it has to support the weight of the bottle. This means that the upper piece of cotton should always break first.