Final Solution-Phy 105-Fall2011-1
... Since article m collides elastically head on with particle M , it is a one dimensional problem in which their total linear momentum and their total kinetic energy are conserved. If u and U are the velocities of the two particles after their collision, the conservation of linear momentum gives, ...
... Since article m collides elastically head on with particle M , it is a one dimensional problem in which their total linear momentum and their total kinetic energy are conserved. If u and U are the velocities of the two particles after their collision, the conservation of linear momentum gives, ...
45 Newton`s Laws Introduction
... 4. Refer to the diagram labeled “A”. If the cart is moving to the right at 3.0m/s, what will happen to the 10kg weight sitting on the top of the cart if the cart stops abruptly? 5. Look up Bernoulli’s Principle in your text. What is the significance of Bernoulli’s Principle with respect to an airpla ...
... 4. Refer to the diagram labeled “A”. If the cart is moving to the right at 3.0m/s, what will happen to the 10kg weight sitting on the top of the cart if the cart stops abruptly? 5. Look up Bernoulli’s Principle in your text. What is the significance of Bernoulli’s Principle with respect to an airpla ...
Practice Exam
... (1) stronger and repulsive (2) weaker and repulsive (3) stronger and attractive (4) weaker and attractive 28 A balloon is rubbed against a student’s hair and then touched to a wall. The balloon “sticks” to the wall due to (1) electrostatic forces between the particles of the balloon (2) magnetic fo ...
... (1) stronger and repulsive (2) weaker and repulsive (3) stronger and attractive (4) weaker and attractive 28 A balloon is rubbed against a student’s hair and then touched to a wall. The balloon “sticks” to the wall due to (1) electrostatic forces between the particles of the balloon (2) magnetic fo ...
Concept Questions
... Step 1: Identify the axis of rotation Step 2: Choose a coordinate system Step 3: Identify the infinitesimal mass element dm. Step 4: Identify the radius, r ,dm , of the circular orbit of the infinitesimal mass element dm. Step 5: Set up the limits for the integral over the body in terms of the phys ...
... Step 1: Identify the axis of rotation Step 2: Choose a coordinate system Step 3: Identify the infinitesimal mass element dm. Step 4: Identify the radius, r ,dm , of the circular orbit of the infinitesimal mass element dm. Step 5: Set up the limits for the integral over the body in terms of the phys ...
Chapter 6. Fluid Mechanics
... of iron is 7,800 kg/m 3 , while a neutron star has a mean density of approximately 1018 kg/m 3 ! The specific gravity of a substance is defined as the ratio of the mass density to that of water at 4 ο C (i.e., 1,000 kg/m 3 ). It would probably be more precise to use the term relative density instead ...
... of iron is 7,800 kg/m 3 , while a neutron star has a mean density of approximately 1018 kg/m 3 ! The specific gravity of a substance is defined as the ratio of the mass density to that of water at 4 ο C (i.e., 1,000 kg/m 3 ). It would probably be more precise to use the term relative density instead ...
2a 4ac bbx 2
... make the surface area of fluid as small as possible • Capillary action: The phenomena of fluids automatically raising in open-ended tubes • Viscosity: The inter-friction mechanism in fluid to dissipate ...
... make the surface area of fluid as small as possible • Capillary action: The phenomena of fluids automatically raising in open-ended tubes • Viscosity: The inter-friction mechanism in fluid to dissipate ...
AP physics final AP test review Mechanics
... are common forces that can act centripetally to cause uniform circular motion. 26. Centripetal Force (A-184 #46) A car initially travels north and then turns to the left along a circular curve. This causes a package on the seat of the car to slide toward the right side of the car. Which of the follo ...
... are common forces that can act centripetally to cause uniform circular motion. 26. Centripetal Force (A-184 #46) A car initially travels north and then turns to the left along a circular curve. This causes a package on the seat of the car to slide toward the right side of the car. Which of the follo ...
Content Standards
... For any pair of interacting objects, the force exerted by from grades K–5 experiences and progresses to specifying the first object on the second object is equal in strength relationships between variables, and clarifying arguments to the force that the second object exerts on the first, but and mod ...
... For any pair of interacting objects, the force exerted by from grades K–5 experiences and progresses to specifying the first object on the second object is equal in strength relationships between variables, and clarifying arguments to the force that the second object exerts on the first, but and mod ...
Relativistic Dynamics
... The first coherent statement of what physicists now call relativity was Galileo's observation almost four hundred years ago that if you were in a large closed room, you could not tell by observing how things move-living things, thrown things, dripping liquids-whether the room was at rest in a buildi ...
... The first coherent statement of what physicists now call relativity was Galileo's observation almost four hundred years ago that if you were in a large closed room, you could not tell by observing how things move-living things, thrown things, dripping liquids-whether the room was at rest in a buildi ...
Solution
... When the ball has rolled to the lowest point, potential energy U = mgh has been converted to kinetic energy of translation and rotation. When the ball moves up on the other side, it will remain spinning at constant angular speed as there is no friction to decrease the angular speed. Thus, only the k ...
... When the ball has rolled to the lowest point, potential energy U = mgh has been converted to kinetic energy of translation and rotation. When the ball moves up on the other side, it will remain spinning at constant angular speed as there is no friction to decrease the angular speed. Thus, only the k ...
Motion, Work , and Power
... The first law states that an object at rest will remain at rest and an object in motion will remain in motion at a constant velocity unless acted upon by an outside force Since constant velocity means the same speed and direction, in order for an object to change velocity, or accelerate, a force mus ...
... The first law states that an object at rest will remain at rest and an object in motion will remain in motion at a constant velocity unless acted upon by an outside force Since constant velocity means the same speed and direction, in order for an object to change velocity, or accelerate, a force mus ...
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.