newtons second law

what is newtons second law

F=ma (or F=mg)

What are the two masses in this experiment

• m_c= mass of a pasco smart cart

• m_h= hanging mass

• and both masses are attached (so both are going the accelerated the same rate)(m_c+m_h)

• bc the masses are attached to each other by a string, gravity acts on the hanger

• f is constant bc the only accelerating force is gravity pulling the hanging mass down

• a inc when total ass dec (inversely propotional)

Wat are we doing in the second set of measurements

you will use a near frictionless inclined plane

net force on the inclined plane will be

parallel 1

what are we using to take measurements in todays lab

pasco’s wireless smart carts

theyre nearly frictionless, minimizing the influence of the external environment on measurements

The essential pices of this setup are

the cart connected by a string to a weight hanging off the edge off the table over a pulley

4-250 g (abt) will be added to the cart to measure a vs m_c for fixed F

5g hanger will provide the force

string attached to the cart post goes over the pulley and attaches to the hanger

additional weight may be added to inc force `

what will we use for mass measurements

a scale

what are the 2 censors on the cart that help with measuring accel

the position sensor

acceleration sensor

the position sensor

determines distance cart moved based on wheel rotation

functions like speedometer and odometer in most cars

capstone allows you to plot postion, vel, accel from the built in position sensor

numerical derivative

the velocity and accel plotted are derived from the raw position data , to avoid the errors, we will only examine poaition vs time data

acceleration sensor

directly measures the accel of the cart in any firection

compare the accel produced by the accel sensor to that found by use of the position sensor

force sensor

directly measures the force applied to the cart

connected to the hook attached to the front of the cart

so any pushing and pulling wilml be recorded

can only measure forces parallel to the tract

first step

level the angle to 0