A force in the $+$xx$-$direction increases linearly from $0$ NN to $9000$ NN in $7\mathrm{.}0$ ss$,$ then suddenly ends.

Part A

What is the average force over this interval of time?

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

FavgFavg $=$

nothingnothing

SubmitRequest$$Answer

Part B

What impulse does this force provide?

Express your answer in newton$-$seconds.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

JxJx $=$

nothing

N$$sN$$s

SubmitRequest$$Answer

Part C

Suppose this force acts on a $1000$ kgkg car initially at rest. What is the car's change of momentum?

Express your answer in kilogram$-$meters per second.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

$$px$$px $=$

nothing

kg$$m$/$skg$$m$/$s

SubmitRequest$$Answer

Part D

What is the car's speed when the force ends?

Express your answer with the appropriat