Pre-Lab Assignment Due at the beginning of Lab) Read over the lab then answer th

Question

Pre-Lab Assignment Due at the beginning of Lab) Read over the lab then answer the following questions. Use the back of the page or attach additional sheets of paper if needed. 1. Briefly explain the procedure for getting the value of g from both the free falling and the track experiments. eSpa a rlatis nrvals a an object vais repr sgra 2. In this experiment, what does the nature of the motion look like-constant velocity, constant acceleration, increasing acceleration, or other? The Spud jactaseo at a Cootant hnthe graph veloci-tine by 3. Consider a frictionless cart moving from rest downward along an incline: What is the acceleration, a, of objects on the incline if the height of the incline h is 4 cm and length L- 4 m 31 A) & 1.1 10.04 B) What is the equation that relates the acceleration, a, of objects on the incline to the angle of the track 0, and g? a sin& C) Calculate the acceleration, a, of obj track . 0° 90° a (s)o.5 0.95 1.7 3.3lo . .224.81 D) Using the calculated values, plot on the axes below your predictions of the acceleration versus angle graph for the motion of the cart and draw a curve fit.

Explanation / Answer

1.A) The sourse of error in case A could be friction between car and inclined plane as friction tries to oppose the relative motion between two objects.

B) In case of free falling the medium is not completely vaccum and presence of air could reflect some error.

C) The cause of error in this case can be stop watch error.

2) By taking many measurements and then we take average of this to get rid of random errors due to individual measurement.

3) In free fall case motion is caused by force of gravity acting downwards but in case of inclined plane force along the plane is mgSin(x), x is the angle of the inclination of the plane , hence we get two different results.

4) As friction tries to oppose the relative motion between the two objects so it slows down the object motion due to which velocity, acceleration and calculated value of g is less then the theoretical value.

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