Zero acceleration if it is traveling in a straight line. An object that is accelerating must either be changing its rate of speed or its direction.
The car is slowing down at a rate of 10 miles per hour for each hour it continues this rate.
1,680/3 = 560 miles per hour
50 miles per hour.
385
if the velocity is constant, the acceleration is zero. The acceleration is the rate at which the velocity changes, so if it stays the same, the car isn't accelerating.
520 miles
5 hours
The car is slowing down at a rate of 10 miles per hour for each hour it continues this rate.
1,680/3 = 560 miles per hour
60 miles if he can sustain the rate.
14 mph
180 miles
35 miles per hour
520
Oh, dude, acceleration is the rate of change of velocity, not the actual velocity itself. Since the object is traveling at a constant velocity, its acceleration is zero. So, like, it's not speeding up or slowing down, just cruising along at a cool 12 miles per hour west for those 15 minutes.
Distance = Rate * Time or, for our purposes, Rate = Distance/Time Rate = 200 miles/4 hours = 50 miles per hour ==============
50 miles per hour.