For most purposes Newton's laws of gravity apply, with minor modifications to take the general theory of relativity into account. 2. Inertia - A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force. 3. Potential Energy - Is the energy stored in an object due to its position in a force field or in a system due to its configuration.
The value of the force constant for the spring is most nearly (A) 0.33 N/m (B) 0.66 N/m (C) 6.6 N/m (D) 33 N/m (E) 66 N/m 4. A block of weight W is pulled along a horizontal surface at constant speed v by a force F, which acts at an angle of with the horizontal, as shown above. The normal force exerted on the block by the surface has magnitude (A) W F cos (B) WFsin (C) W (D) W + Fsin (E) W + Fcos 5. When the frictionless system shown above is accelerated by an applied force of magnitude the tension in the string between the blocks is (A) 2F (B) F (C) F (D) F (E) F 6. A push broom of mass m is pushed across a rough horizontal floor by a force of magnitude T directed at angle as shown above.
For collisions, the momentum before the collision is equal to the momentum after the collision e.g. snooker balls Momentum before collision EQUALS Momentum after collision p=mv p=0 p=0 p=mv Another example is cannon before being fired and after being fired. Before the cannon is fired the momentum is zero, after it is fired the cannon ball moves forward and the cannon moves back. The momentum of the cannon ball is the same as the momentum of the cannon moving backwards. In this sort of example you should choose one direction to be positive and the other direction to be negative.
Potential energy is the energy an object has because of its position in relatibn to other objects. Kinetic energy is energy associated with a moving object. (p. 27). 24. According to the First Law of Thermodynamics, energy cannot be created or destroyed.
Electric charge, which can be positive or negative, occurs in discrete natural units and is neither created nor destroyed. Electric force – Is the attraction or repulsion of particles or objects because of their electric charge it is one of the basic physical forces. Magnetic force – Is the attraction or repulsion that arises between electrically charged particles because of their motion; the basic force responsible for the action of electric motors and the attraction of magnets for iron. (Britannica, 2014) Britannica. 2014.
Description and Theories A. Principles and Theories Used to Obtain our Result An conventional spring, when subjected the weight (w=mg) of an object at one of its terminations, will displace a certain distance, x, with an equal and opposite force, F, being created in the spring of which opposes the pull of the weight. This conventional spring will become significantly distorted if it is subjected to a large enough weight and the force, F, will only be able to return the spring to its original configuration once the burden is removed. The force that will restore the spring to its original configuration is directly proportional to the displacement that occurred. The following equation represents this relationship where k denotes the spring constant or stiffness of the spring, F=-kx Since x symbolizes the displacement or change in the length of the spring the above equation can now be surmised in the following manner, F=mg=-k∆l This new form makes it evident that a linear proportion exists between the plot of F as function of changing in length, ∆, thus confirming the spring does in fact obey Hooke’s Law.
must have constant velocity. must have zero momentum. 10. The inertial mass of a body may be defined as A. B. C. D. the ratio of the resultant force acting on the body to its acceleration.
Newton’s second law of motion is expressed as a mathematical equation: Fnet = ma (Force = mass*acceleration) A significant notion of this equation is that an object accelerates in the direction of the new force, and acceleration is created by the net force. The SI unit for force in the above equation is Newton (N), SI unit for accelerations is metre per second squared (m/s2) and the SI unit for mass is kilograms (kg). The objective of this experiment was to show the relationship between acceleration and force in a frictionless environment and to show the concept of mass (Lab#1). Other equations used in this experiment were: V22 = V12 + 2ad; used to find the acceleration for each weight V1 = Lt1 and V2 = Lt1; both used to find the acceleration Materials * Two vernier photogate timers * String * Glider * Blower * Air—cushioned track * Weights and Hanger * Pulley and clamps * Vernier Lab Pro Procedure and Observations 1. Two photogate timers, 60 cm apart, were set over the air track.
|Resistance |Effort | |Force, as added mass |Arm length |Work |A |B |Total force |Arm length |Work | |to resistance side (g)|(m) |(N × m or J) |Force (N) applied |Pulling force applied |B-A |(m) |(N × m or J) | |converted to (N) | | |to balance the |to the spring scale | | | | | | | |lever with no mass|(n) when mass is added| | | | | | | |on effort side |to effort side | | | | |300 g = |0.70 |2.058 |0.87 |22.74 |21.87 |0.40 |8.748 | |2.94 N | | | | | | |
Newton’s Second Law 3/6/2014 Purpose The purpose of this experiment is to determine the acceleration of gravity using Newton’s second law. Equipment * Air track, used to place other equipment on to test. * Cart, used as the bigger mass in the experiment. * String, attached to the bigger and smaller masses. * Paper clip, used as a hanger for the smaller mass.