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.
F L D. F L P P 8805-6504 –7– 9. N05/4/PHYSI/SPM/ENG/TZ0/XX+ If the resultant external force acting on a particle is zero, the particle A. B. C. D. must have constant speed. must be at rest. must have constant velocity.
Forces Test Review 1. Inertia can be best described as the (A) force that keeps an object in motion with constant velocity (B) force that keeps an object at rest (C) force that overcomes friction (D) property responsible for an object's resistance to changes in motion (E) property responsible for slowing down an object 2. A box is given a sudden push up a ramp. Friction between the box and the ramp is not negligible. Which of the following diagrams best represents the directions of the actual forces acting on the box as it moves upward after the push?
e. is one-half. 3. The gas phase reaction A + B C has a reaction rate which is experimentally observed to follow the relationship rate = k[A]2[B]. Which one of the following would affect the value of the specific rate constant, k? a. decreasing the temperature b. changing the concentration of A c. changing the concentration of B d. changing the concentration of C e. letting the reaction go on for a long time 4.
Paulina Crisostomo Period 3 11/3/08 Motion Graphing Labs Lab 1: straight line motion- Aim- to measure and calculate the speed of an object Key Question- Will the objects go at a constant speed, increase, or decrease in speed? Hypothesis- I think the cars will have a constant speed at each of the distances they travel Materials- electric car, timer and meter stick Procedure- 1. Time the electric car going at a distance of 1 meter twice 2. Time the electric car going at a distance of 2 meters twice 3. time the electric car going at a distance of 3 meters twice 4. calculate the speed of each time you took Inferences- • I think the car will travel at a constant speed for all the distances • I think the car will travel at an angle instead of a straight line • I think that the car will have the same speed for all three distances Observations- • The car seemed to be going at a constant distance for the first meter • the car did not go in a straight line, it curved just like I predicted it would • the car had the same time for distances 2 and 3 • the car had about the same speed for the first meter compared to 2 and 3 • some other cars I watched did not go at a constant speed, but ours did analysis- 1. How does average speed relate to the distance covered and the time taken for travel?
Buoyancy Lab Report I. Theory: In this experiment, we are trying to prove a theory that buoyancy is a force exerted by a liquid, in this case water, which opposes an object's weight. The theoretical buoyant force is given by FB=ρgV with ρ is density (kg/m3), g is gravitational acceleration (m/s2), and V is volume (m3).To measure the buoyant force, we compare the weight of an object in and out of the water by FB=Wout – Win. The simplifying assumptions are no surface tension, no friction, no air resistance, and gravitational acceleration is constant at 9.8m/s2. II.
), if this Qsp is greater than the Ksp of production, precipitate will form. In this kind of question, the concentration and volume of each solution usually be given. So we ne calculate each ion’s new concentrations in the new solution. We will use this formula: New concentration = c×V initialV final Then, we can calculate out the Qsp and compare with the Ksp Qsp <Ksp: the system attains equilibrium by moving to the right favouring dissociation. More solid can dissolve.
P1V1=P2V2 3. Explain how your experiment results further prove Boyle’s law. Answer: As the pressure increased, the volume of the gas decreased. When multiplying the pressure change with the volume change, the product was always the same. This further proved Boyle’s Law.
Momentum, Energy and Collisions Date: Oct. 30 Purpose: to identify that the momentum before and after the collision are the same, so the total momentum of the system is conserved. Theory: The collision of two carts on a track can be described in terms of momentum conservation and, in some cases, energy conservation. If there is no net external force experienced by the system of two carts, then we expect the total momentum of the system to be conserved. This is true regardless of the force acting between the carts. In contrast, energy is only conserved when certain types of forces are exerted between the carts.
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.