Answer:
acceleration = -1.2 m/s^2
Step-by-step explanation:
We can use the equation of motion for constant acceleration to solve this problem. When the crate slides along the floor, there is a force of friction acting on it, which opposes its motion. The force of friction can be found using the following equation:
force of friction = mass x acceleration
We can use the kinematic equation to find the acceleration of the crate:
velocity = initial velocity + acceleration x time
Rearranging this equation, we get: acceleration = (velocity - initial velocity) / time
Plugging in the values we have: acceleration = (0 m/s - 12 m/s) / 10 s
Simplifying, we get: acceleration = -1.2 m/s^2