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.
11. The velocity of a body of mass m changes by an amount ∆v in a time ∆t. The impulse given to the body is equal to A. B. C. D. m∆t . ∆v .
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. This enabled the group to determine the spring constant k. B. Derivation of Equations Definitions To gain a better understanding of the terms used here
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.
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.
Physics 1408 Section E1 Standing Waves in a Vibrating Wire Callie K Partner: Miguel E Date Performed: March 20, 2012 TA: Raziyeh Y Abstract This lab had two purposes. The first was to determine the relationship between the length of a stretched wire and the frequencies at which resonance occurs. The second was to study the relationship between the frequency of vibration and the tension and linear mass density of the wire. In the first part we found the resonance, frequency and wavelength of a wire and used this data to calculate the speed of the traveling waves. For first harmonic, our wavelength was 1.200 m, found by the formula λ=2L/n.
Experiment 1: Pressure, Temperature, and Velocity Measurement Objective: The objective of this experiment is to determine the pressure and density of laboratory air, calibrate a pressure transducer and scannivalve, then determine the test section speed as a function of fan speed using three methods of velocity measurement. Equipment: Absolute pressure transducer, digital thermometer, pressure transducer (voltmeter), micromanometer, scannivalve, Pitot tube, low-speed wind tunnel. Part 1: Measurement of Atmospheric Pressure and Density 1. Read the barometer and wind-tunnel thermocouple. 2.
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.
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.
Law 2. The acceleration of an object is inversely proportional to its mass and directly proportional to the net external force acting on it. 3. Law 3. Forces always occur in pairs.