Acceleration is best defined as the rate of change of of an object.
a. position
b. velocity
c. distance
d. force

B velocity

Explanation:

Acceleration = Velocity difference / time

Acceleration is a vector it can be happened due to forces of the system. If there is no external force acting on a system. There are no acceleration. If velocity is increasing due to Force its called acceleration If velocity is decreasing its called deceleration

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.