Notes in pdf format
... For two-dimensional motions, we have learned, that the horizontal and vertical components can be treated separately, therefore the x and y components of the net force have to sum up to zero. ∑Fx = 0 and ∑Fy = 0. Also the rotational motion doesn’t change in equilibrium. this means that the net extern ...
... For two-dimensional motions, we have learned, that the horizontal and vertical components can be treated separately, therefore the x and y components of the net force have to sum up to zero. ∑Fx = 0 and ∑Fy = 0. Also the rotational motion doesn’t change in equilibrium. this means that the net extern ...
PGS Physics Department IB Work, Energy amd Power Worksheet
... of 30 m s–1. The acceleration of free fall is 10 m s–2, but air resistance cannot be neglected. The graph below shows the variation with time t of the velocity v of this ball for the upward part of the motion. v / ms–1 ...
... of 30 m s–1. The acceleration of free fall is 10 m s–2, but air resistance cannot be neglected. The graph below shows the variation with time t of the velocity v of this ball for the upward part of the motion. v / ms–1 ...
Dynamics and Space - Eyemouth High School
... Mass measures the amount of matter in an object. It is measured in kilograms (kg). The value of mass does not change from place to place. ...
... Mass measures the amount of matter in an object. It is measured in kilograms (kg). The value of mass does not change from place to place. ...
PHYS 307 LECTURE NOTES, Daniel W. Koon, St. Lawrence Univ.
... where the vector on the left is the weight, m is the mass, and the vector on the right is a factor that depends on whether you are on the moon, on the Earth at sea level, or in say Denver. For our purposes, we will always use g = 9.8 m/s2 for its magnitude, unless the problem states otherwise. Well, ...
... where the vector on the left is the weight, m is the mass, and the vector on the right is a factor that depends on whether you are on the moon, on the Earth at sea level, or in say Denver. For our purposes, we will always use g = 9.8 m/s2 for its magnitude, unless the problem states otherwise. Well, ...
AP Summer Assignment - York County School Division
... (1) The potential difference across the 6 ohm resistor is half as great as the potential difference across the 3 ohm resistor. (2) The potential difference across the 6 ohm resistor is four times as great as the potential difference across the 3 ohm resistor. (3) The potential difference across the ...
... (1) The potential difference across the 6 ohm resistor is half as great as the potential difference across the 3 ohm resistor. (2) The potential difference across the 6 ohm resistor is four times as great as the potential difference across the 3 ohm resistor. (3) The potential difference across the ...
Honors/CP Physics
... 39. An object is projected vertically upward from ground level. It rises to a maximum height, H. If air resistance is negligible, which of the following must be true for the object when it is at a height ½H? (A) Its speed is half of its initial speed. (B) Its kinetic energy is hall of its initial k ...
... 39. An object is projected vertically upward from ground level. It rises to a maximum height, H. If air resistance is negligible, which of the following must be true for the object when it is at a height ½H? (A) Its speed is half of its initial speed. (B) Its kinetic energy is hall of its initial k ...
SIMPLE HARMONIC MOTION
... returning to its starting point after a constant time interval and then starting a new cycle. Simple harmonic motion is periodic motion that occurs when the restoring force on a body displaced from an equilibrium position is proportional to the displacement and in the opposite direction. A mass m at ...
... returning to its starting point after a constant time interval and then starting a new cycle. Simple harmonic motion is periodic motion that occurs when the restoring force on a body displaced from an equilibrium position is proportional to the displacement and in the opposite direction. A mass m at ...
Mass versus weight
In everyday usage, the mass of an object is often referred to as its weight though these are in fact different concepts and quantities. In scientific contexts, mass refers loosely to the amount of ""matter"" in an object (though ""matter"" may be difficult to define), whereas weight refers to the force experienced by an object due to gravity. In other words, an object with a mass of 1.0 kilogram will weigh approximately 9.81 newtons (newton is the unit of force, while kilogram is the unit of mass) on the surface of the Earth (its mass multiplied by the gravitational field strength). Its weight will be less on Mars (where gravity is weaker), more on Saturn, and negligible in space when far from any significant source of gravity, but it will always have the same mass.Objects on the surface of the Earth have weight, although sometimes this weight is difficult to measure. An example is a small object floating in a pool of water (or even on a dish of water), which does not appear to have weight since it is buoyed by the water; but it is found to have its usual weight when it is added to water in a container which is entirely supported by and weighed on a scale. Thus, the ""weightless object"" floating in water actually transfers its weight to the bottom of the container (where the pressure increases). Similarly, a balloon has mass but may appear to have no weight or even negative weight, due to buoyancy in air. However the weight of the balloon and the gas inside it has merely been transferred to a large area of the Earth's surface, making the weight difficult to measure. The weight of a flying airplane is similarly distributed to the ground, but does not disappear. If the airplane is in level flight, the same weight-force is distributed to the surface of the Earth as when the plane was on the runway, but spread over a larger area.A better scientific definition of mass is its description as being composed of inertia, which basically is the resistance of an object being accelerated when acted on by an external force. Gravitational ""weight"" is the force created when a mass is acted upon by a gravitational field and the object is not allowed to free-fall, but is supported or retarded by a mechanical force, such as the surface of a planet. Such a force constitutes weight. This force can be added to by any other kind of force.For example, in the photograph, the girl's weight, subtracted from the tension in the chain (respectively the support force of the seat), yields the necessary centripetal force to keep her swinging in an arc. If one stands behind her at the bottom of her arc and abruptly stops her, the impetus (""bump"" or stopping-force) one experiences is due to acting against her inertia, and would be the same even if gravity were suddenly switched off.While the weight of an object varies in proportion to the strength of the gravitational field, its mass is constant (ignoring relativistic effects) as long as no energy or matter is added to the object. Accordingly, for an astronaut on a spacewalk in orbit (a free-fall), no effort is required to hold a communications satellite in front of him; it is ""weightless"". However, since objects in orbit retain their mass and inertia, an astronaut must exert ten times as much force to accelerate a 10‑ton satellite at the same rate as one with a mass of only 1 ton.On Earth, a swing set can demonstrate this relationship between force, mass, and acceleration. If one were to stand behind a large adult sitting stationary on a swing and give him a strong push, the adult would temporarily accelerate to a quite low speed, and then swing only a short distance before beginning to swing in the opposite direction. Applying the same impetus to a small child would produce a much greater speed.