19. Acceleration is defined as the CHANGE in a. time it takes to move from one speed to another speed.
b. velocity divided by the time interval.
c. velocity of an object.
d. time it takes to move from one place to another place.
e. distance divided by the time interval.

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?