Acceleration = (change in speed) / (time interval)
= (50 - 30) mph / 20 sec = (20 mi/hr) (1/3,600 hr/sec) (5,280 ft/mi) / (20 sec)
= (20 x 5,280) / (3,600 x 20) (mi - hr - ft / hr - sec - mi - sec)
= 1.4667 ft/sec2 (rounded, repeating)
Constant velocity is a measure of distance traveled per unit of time at a uniform speed, such as miles per hour or feet per second. Constant acceleration is a measure of a continuing increase in velocity per unit of time, as when a car speeds up from 30 miles per hour to 40 miles per hour in 5 seconds, then from 40 miles per hour to 50 miles per hour during the next 5 seconds. It will then have had a constant acceleration of 10 miles per hour per 5 seconds.
The answer depends on whether the rate of acceleration is uniform. There is no indication in the question that it is.
If its speed is constant, its acceleration is nil.
There is no acceleration if the car is travelling at a steady 54,000 miles per hour.
7.5 miles per hour.
Acceleration is the rate of change in velocity (speed) Thus if your speed is constant (50 miles per hour) your acceleration is zero
No. "Miles per hour" is a speed. An acceleration might be "Miles per hour per hour", or "miles per hour squared".
Constant velocity is a measure of distance traveled per unit of time at a uniform speed, such as miles per hour or feet per second. Constant acceleration is a measure of a continuing increase in velocity per unit of time, as when a car speeds up from 30 miles per hour to 40 miles per hour in 5 seconds, then from 40 miles per hour to 50 miles per hour during the next 5 seconds. It will then have had a constant acceleration of 10 miles per hour per 5 seconds.
The answer depends on whether the rate of acceleration is uniform. There is no indication in the question that it is.
If its speed is constant, its acceleration is nil.
There is no acceleration if the car is travelling at a steady 54,000 miles per hour.
7.5 miles per hour.
Acceleration = change in speed/time = (20-5)/3 = 15/3 = 5 units of speed per second. It is not possible to be any more precise because the unit of speed (kilometres per hour, miles per hour, metres per second) is unspecified.
Acceleration = (change in speed) divided by (time for the change)= (30 mile/hour) / (3 seconds) = (30 mile/hour x 5,280 feet/mile) / (3,600 sec/hour x 3 seconds)= (30 x 5,280) / (3,600 x 3) = 14 and 2/3 feet per second2 = about 0.457 G
It goes from 0 mph to 80 mph in 1.8 seconds Acceleration = change in speed/time taken = (80 - 0)/1.8 mph per second = 44.4 mph per sec
Miles per hour and seconds are units of measurement of speed and time respectively, which are scalar quantities.
Acceleration = -20 mi/h^2