# AP Physics 1: 3.2 System Interactions and Changes

AP Physics 1: 3.2 System Interactions and Changes. Which of the following is closest to the cannonball's speed one second after launch?

AP Physics 1 | System Interactions and Changes |

Language | English Language |

Science Practice 5 | Performing data analysis |

### Transcript

from a cannon at t equals zero However the cannon

does not object with a constant force Instead it follows

the plot above using this information which of these speeds

is closest to that of the cannon ball One second

after the cannon is launched and the applied force goes

to zero All right And here the potential answer who

Good question Ah forced time graph We remember back when

we were young and saw forced time grab for the

first time It was new and scary Now that we're

old and withered We know how to make it work

for us right Well when we see this graph we

know we're dealing with impulse impulses The change in mo

mentum over an interval of time and mo mentum is

equal to mass times the change of velocity To find

the impulse using our force time graph we need to

figure out the area under the curve In our graph

here we could break it into two parts a triangle

and a rectangle Then we calculate the area of each

shape Well we'll tackle the triangle first To get that

we use the formula of one half base times height

Shmoop And then we'll take the area of the rectangle

base times height Well if we add them together we

get a total impulse of two thousand two hundred fifty

newton seconds All right because we now know the impulse

we can plug in our numbers and solve for velocity

right ankle Sometimes be i get to hand him over

to kilograms Let me point you alright so all we

have to do is around eleven point two five down

to eleven and will arrive at our answer option A 00:01:54.72 --> [endTime] That wasn't too bad We owe you