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∙ 14y agoAcceleration = (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)
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∙ 14y agoConstant 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
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.
Acceleration is typically measured in units such as meters per second squared or kilometers per hour per second. Using miles per hour is not a common unit for acceleration measurements.
If its speed is constant, its acceleration is nil.
To calculate acceleration in miles per hour per second, first convert the acceleration from 0 to 60 mph in 3 seconds to miles per hour. 60 mph / 3 sec = 20 mph/sec. So, the acceleration in miles per hour per second is 20 mph/sec.
There is no acceleration if the car is travelling at a steady 54,000 miles per hour.
7.5 miles per hour.
To calculate the speed in miles per hour, first convert 6 tenths of a mile to miles (0.6 miles). Then, calculate the speed using the formula speed = distance / time. In this case, speed = 0.6 miles / (1.2 seconds / 3600) = 1800 mph.
Miles per hour and seconds are units of measurement of speed and time respectively, which are scalar quantities.
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