Instructions Grading Scheme
... During the bounce, the first ball is in contact with the ground for twice as long as the second. The average force exerted by the ground is twice as much for the first ball than the second. a. True b. False 6. Newton’s cradle is a toy with five steel balls suspended vertically by strings in a single ...
... During the bounce, the first ball is in contact with the ground for twice as long as the second. The average force exerted by the ground is twice as much for the first ball than the second. a. True b. False 6. Newton’s cradle is a toy with five steel balls suspended vertically by strings in a single ...
Instructions Grading Scheme
... During the bounce, the first ball is in contact with the ground for twice as long as the second. The average force exerted by the ground is twice as much for the first ball than the second. a. True b. False 7. Newton’s cradle is a toy with five steel balls suspended vertically by strings in a single ...
... During the bounce, the first ball is in contact with the ground for twice as long as the second. The average force exerted by the ground is twice as much for the first ball than the second. a. True b. False 7. Newton’s cradle is a toy with five steel balls suspended vertically by strings in a single ...
Electric Circuits
... (MC) A block is initially moving at a speed of 5 m/s to the right. If no net force acts on it, what will be its subsequent motion? a) The block moves to the right and slows down. b) The block moves to the right at the same speed. c) The block moves to the right and speeds up. d) Its subsequent motio ...
... (MC) A block is initially moving at a speed of 5 m/s to the right. If no net force acts on it, what will be its subsequent motion? a) The block moves to the right and slows down. b) The block moves to the right at the same speed. c) The block moves to the right and speeds up. d) Its subsequent motio ...
Lecture-14-10
... the end of a second, by taking the moment of inertia to be 1.2x1038 kgm2 and the initial angular speed to be 190 s-1. Δω over one second is given by the angular acceleration. ...
... the end of a second, by taking the moment of inertia to be 1.2x1038 kgm2 and the initial angular speed to be 190 s-1. Δω over one second is given by the angular acceleration. ...
2nd 9 weeks
... 2016.17 Physics, Quarter 2 Big Ideas/Key Concepts: Laws of mechanics are the foundations of classical physics. Standards ...
... 2016.17 Physics, Quarter 2 Big Ideas/Key Concepts: Laws of mechanics are the foundations of classical physics. Standards ...
Force Doubling Paradox of Gravitational Attraction
... force of gravity varied with distance, following the inverse distance squared equation, but he did not propose a cause for gravity or inertia in any of his publications. Although, the following quote, from a private letter to Robert Boyle, shows Newton did conceive of a cause for gravity that is ess ...
... force of gravity varied with distance, following the inverse distance squared equation, but he did not propose a cause for gravity or inertia in any of his publications. Although, the following quote, from a private letter to Robert Boyle, shows Newton did conceive of a cause for gravity that is ess ...
Unit 6 Curvilinear Motion Particle Models
... G. The net force needed to keep a constant speed object’s path circular is directly proportional to the object’s mass. H. The net force needed to keep a constant speed object’s path circular is directly proportional to the object’s velocity squared. I. The net force needed to keep a constant speed o ...
... G. The net force needed to keep a constant speed object’s path circular is directly proportional to the object’s mass. H. The net force needed to keep a constant speed object’s path circular is directly proportional to the object’s velocity squared. I. The net force needed to keep a constant speed o ...
File
... Find the tension in the string joining the two carts. 22. If the force of friction on a block sliding on the surface of the Earth is considered the action force, what is the reaction force? 23. The normal force acting on a book at rest on a horizontal table top is considered the action force. What i ...
... Find the tension in the string joining the two carts. 22. If the force of friction on a block sliding on the surface of the Earth is considered the action force, what is the reaction force? 23. The normal force acting on a book at rest on a horizontal table top is considered the action force. What i ...
COM and Momentum
... Q16) If the total momentum of a system is changing: 1) particles of the system must be exerting forces on each other 2) the system must be under the influence of gravity 3) the center of mass must have constant velocity 4) a net external force must be acting on the system 5) none of the above ...
... Q16) If the total momentum of a system is changing: 1) particles of the system must be exerting forces on each other 2) the system must be under the influence of gravity 3) the center of mass must have constant velocity 4) a net external force must be acting on the system 5) none of the above ...
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.