How does fluid friction explain why it takes more force to move a 200-person ferry boat across a body of water than to move a small, 5-person boat that same distance at the same speed?​

=force × distance a. work b. velocity c. pressure d. momentum

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?