Circular motion lab an object that moves in a circle at constant speed v is said to undergo uniform circular motionexamples are a ball on the end of a string revolved around one's head -douglas giancoli. Speed _____ and your rotational speed _____ b centripetal force and centrifugal force centripetal force is defined as an inward force on a body that causes it to move in circles. Just as you determined the mass of jupiter from the orbital speed and orbital radius of its moons in the previous lab, you can determine the mass of this star using the formula from newtonian gravity, m = (v 2 × r) / g where v is now the orbital speed, r is the orbital radius, and newton's gravitational constant is g = 667×10-11 m 3 / kg. To obtain the speed, we will need to combine the angular speed, (, with the radius of the circular path, r, since the apparatus in the experiment will measure the angular speed the magnitude of the speed is simply related to the angular speed and radius.
In fact, the average speed and the radius of the circle are directly proportional a twofold increase in radius corresponds to a twofold increase in speed a threefold increase in radius corresponds to a three--fold increase in speed and so on. Increases, or the speed increases, or the radius decreases, which is consistent with theoretical relationship between centripetal force ( f ) and the mass ( m ), speed ( v ), and radius ( r ) you have. Centripetal force objectives in this lab you will v is the speed, and r the radius of the circular path experimental results for the centripetal force one.
Also notice that the very top point on the wheel is moving with speed 2v cm- faster than any other point on the wheel rotational dynamics now consider an object rolling down an incline plane. So there is an inverse relationship between the force and radius,and direct proportionality between the force and velocity and that tells us if the velocity speeds up the force will be stronger and the radius well be smaller. Dependence of the speed (v) on the radius (r) at a constant centripetal force in this part of the experiment, you are going to keep the mass, m and centripetal force constant and see how the speed ( v ) varies by changing the radius ( r ) of a uniform circular motion. The object speed, radius of the circle, and object mass can be varied by using the write a conclusion to this lab in which you completely and intelligently.
5) set up the flying pig apparatus and have each of your lab partners measure the radius of the circular path r, the length of the string l, and the period of motion t 6) calculate the experimental value for the speed v. The magnitude of centripetal acceleration is: a = v 2 /r where r is the radius and v is the constant speed as the radius becomes larger, the direction changes more slowly, meaning a smaller acceleration. By steven holzner mass, velocity, and radius are all related when you calculate centripetal force in fact, when you know this information, you can use physics equations to calculate how much force is required to keep an object moving in a circle at the same speed. Centripetal force 1 introduction radius, at constant speed, the force must exactly match the mass, speed and radius of the circle have one lab partner. If the radius is increased, i believe that the speed will decrease, giving speed and its radius an inverse relation variables the variables in this lab are the radius of the circular path, mass of the rubber stopper, mass of the hanging weight, number of revolutions, elapsed time, period, and speed.
The lab is done through the use of a string that has one end tied to a rubber stopper and the other tied to a number of washers after, we used a meter stick to mark out our fixed radius position by sticking a. The radius or the mass of the disk • the speed at the bottom is less than when the disk slides down a frictionless ramp: v = 2 gh. Centripetal force lab increasing the speed desired radius and should have the constant centripetal force equal to the hanging weight 8 you must maintain the. Target angular speed (we won't use radians in this lab and but this makes changing the mass without changing the radius of revolution a lot easier you can. 2 terminal velocity abstract the lab that our class has conducted observes and verifies the relationship that exists between an object's mass and its terminal velocity during free fall, while keeping the surface area that is.
Circular motion with speed v in a path of radius r has period (time for one revolution) t and frequency (revolutions/s) f = 1/ t since the object travels a distance 2 π r (the circumference of its circular path) in time t the speed v is equal to. Centripetal force = mass x velocity 2 / radius note that the conditions here assume no additional forces, like a horizontal circle on a frictionless surface for a vertical circle , the speed and tension must vary. Lab 2: kinematics and terminal velocity introduction on the object's speed to the radius of the sphere so we can still test whether. In this lab, students will be able to change the radius and the linear speed of a wheel they can then see how each of these variables affects the angular speed students can also look at the relationship between angular distance and linear distance.
The most difficult quantity (of mass, speed, and radius) to hold constant from trial to trial in an experiment is the speed of the object, so it is easiest to study the effect of speed on centripetal force, since it is relatively easy to hold the mass of the object and the radius of the circle constant.