acceleration = change in speed /time = (10-25)/240=15/240 = -1/16
The train is slowing down (decelerating) at a rate of 1/16 mile per second per second
Added:
Hate wasting work! Same answer in decimal.
Acceleration ( looks like slow down here ) = change in velocity/change in time
10 mi/s = 25 mi/s/240 s - 0
= - 0. 0625 mi/s2
======================long time braking
-2.33 metres per second squared
Acceleration = change in velocity/change in time Acceleration = 96 miles per second - 32 miles per second/8 seconds = 8 miles per second per second or, better expressed 8 mi/s^2 ---------------
Acceleration = (change in speed) / (time for the change)= (10 - 25) / 240 = -15/240 = -0.0625 meter/sec2The acceleration is negative, which is a description of slowing down.
The sprinter's acceleration is 2 meters per second squared.
The change in velocity was 8 m / s. Divide that by 4 seconds and get 2 m / s2 -- sometimes stated as acceleration of 2 meters per second per second.
-2.33 metres per second squared
An object with a constant acceleration will have its velocity change by the same amount each second. The acceleration remains constant, causing a uniform increase or decrease in velocity over time.
An object with velocity that changes by the same amount each second is experiencing uniform acceleration. This means that its velocity is increasing or decreasing by a constant rate over time.
The acceleration of gravity.
The SI unit for acceleration is meters per second squared (m/s^2). This unit represents how the velocity of an object changes over time.
So acceleration is an increase of speed every second. The increase of speed was 9miles/sec and this was over 3 seconds. Therefore there was an acceleration of 3 miles/second every second i.e. 3m/s2
Seconds are not squared in the acceleration formula. The units for acceleration are meters per second squared (m/s^2), where the time unit (seconds) is squared to represent the change in velocity over time.
Acceleration = change in velocity/change in time Acceleration = 96 miles per second - 32 miles per second/8 seconds = 8 miles per second per second or, better expressed 8 mi/s^2 ---------------
After 15 seconds, the train's speed would be 7.5 miles per second. This can be calculated by multiplying the acceleration (0.5 miles per second) by the time (15 seconds).
Acceleration = (change in speed) / (time for the change)= (10 - 25) / 240 = -15/240 = -0.0625 meter/sec2The acceleration is negative, which is a description of slowing down.
Acceleration of the object.
None of the units make sense here, please recheck units and ask again