Question

A rowboat passenger uses an oar to push the boat off the dock by exerting a force of 30.0 N for 4.0 s. What impulse acts on the boat?

A. 7.5 kg * m/s
B. 480 kg * m/s
C. 0.13 g kg * m/s
D. 120 kg * m/s

** :/

Answer 1

it is simple, we have to apply this formula:
\[\Large I = F\Delta t\]

Answer 2

so we can write:
\[\Large I = F\Delta t = 30 \times 4 = ...\]

Answer 3

120? so choice D is our solution?

Answer 4

yes! That's right!

Answer 5

yay!! thank you!