During the half-arc when the pendulum bob is falling toward the center, gravity is
doing work on it ... exerting a force which moves through a distance ... and adding
to its kinetic energy.
During the other half, when the bob is moving up from the center, it's using its
own kinetic energy to work against gravity. That moves it to a higher elevation,
adding to its gravitational potential energy, and placing it in a position from which
it can fall again.
No, the tension in the string of a swinging pendulum does not do any work. The tension force acts perpendicular to the direction of motion, so it does not apply a force in the direction of displacement. This means that no work is done by the tension force on the pendulum.
Gravity can be measured many ways. You can drop an object and observe how it falls and determine the objects acceleration. With that in hand you can then calculate the force required, and measure gravity that way. You can use a scale, and determine the force acting upon the object placed on it to compress the springs a certain distance, or deflect it a certain distance (depending on the scale's design). A pendulum can be used to measure gravity. The period of a pendulum is directly influenced by the magnitude of the accelerating force (gravity) you can measure altitude with a sensitive pendulum. As gravity is a force, any method you would use to determine the force of one object exerting upon another would work to measure gravity.
Factors that can alter the periodic time for a pendulum include the length of the pendulum arm, the acceleration due to gravity, the angle at which the pendulum is released, and air resistance. Furthermore, the mass of the pendulum bob and any external force applied can also affect the periodic time.
Gravity needs no specific "devices". ANY mass in the Universe attracts ANY other mass. So, the only thing you need for gravity to work, is to have two objects that have mass - so basically, any two objects.
For a heavy weight on the end of a weightless string ("a simple pendulum") the period is 2.pi.squareroot(L/g) where L is the length of the string and g is the acceleration due to gravity. If the weight of the pendulum is not wholly at the end (as in a heavy rod instead of a light string) then replace L by k2/L where L is (as before) the distance to the centre of gravity below the suspension point, and k is the radius of gyration of the whole suspended part, inculding the arm of the pendulum as well as any weights ("compound pendulum").
Gravity, At any instant time the restoring force is the component of gravity acting parallel to the direction of the motion.
No, the tension in the string of a swinging pendulum does not do any work. The tension force acts perpendicular to the direction of motion, so it does not apply a force in the direction of displacement. This means that no work is done by the tension force on the pendulum.
Gravity can be measured many ways. You can drop an object and observe how it falls and determine the objects acceleration. With that in hand you can then calculate the force required, and measure gravity that way. You can use a scale, and determine the force acting upon the object placed on it to compress the springs a certain distance, or deflect it a certain distance (depending on the scale's design). A pendulum can be used to measure gravity. The period of a pendulum is directly influenced by the magnitude of the accelerating force (gravity) you can measure altitude with a sensitive pendulum. As gravity is a force, any method you would use to determine the force of one object exerting upon another would work to measure gravity.
Factors that can alter the periodic time for a pendulum include the length of the pendulum arm, the acceleration due to gravity, the angle at which the pendulum is released, and air resistance. Furthermore, the mass of the pendulum bob and any external force applied can also affect the periodic time.
Yes. You can increase the period by moving the pendulum to a location where the gravitational force is weaker.Alternatively, you can increase the effective length of the pendulum. The pendulum may be of fixed length, but you can still increase its effective length by adding mass to any point below its centre of gravity.Yes. You can increase the period by moving the pendulum to a location where the gravitational force is weaker.Alternatively, you can increase the effective length of the pendulum. The pendulum may be of fixed length, but you can still increase its effective length by adding mass to any point below its centre of gravity.Yes. You can increase the period by moving the pendulum to a location where the gravitational force is weaker.Alternatively, you can increase the effective length of the pendulum. The pendulum may be of fixed length, but you can still increase its effective length by adding mass to any point below its centre of gravity.Yes. You can increase the period by moving the pendulum to a location where the gravitational force is weaker.Alternatively, you can increase the effective length of the pendulum. The pendulum may be of fixed length, but you can still increase its effective length by adding mass to any point below its centre of gravity.
That simply means that the pendulum doesn't feel any gravity, which would make it move.
Gravity needs no specific "devices". ANY mass in the Universe attracts ANY other mass. So, the only thing you need for gravity to work, is to have two objects that have mass - so basically, any two objects.
The units of the force of gravity, or any force for that matter, are Newtons.
No, if your asking if gravity counters any force, then the answer is no.
the force of attraction between any two masses is called force of gravity the gravity of the _____ is approximately ____ .
No. The force of gravity is measured in newtons, like any other force.
Very little affect. The weight is chosen by: 1) Won't require enormous bearings, or clockworks. 2) Heavy enough so that air resistance is not the dominant force. 3) Not so heavy that the Earth's rotation will not break the clock. etc.