A 73kg human sprinter can accelerate from rest to 12m/s in 2.7s . During the same interval, a 27kg greyhound can accelerate from rest to 19m/s .
What is the question?
To compare the accelerations of the human sprinter and the greyhound, we need to use the formula for acceleration:
acceleration = (final velocity - initial velocity) / time
For the human sprinter:
Initial velocity = 0 m/s (since the human starts from rest)
Final velocity = 12 m/s
Time = 2.7 s
Plugging these values into the formula, we can calculate the acceleration of the human sprinter:
acceleration_human = (12 m/s - 0 m/s) / 2.7 s
acceleration_human = 4.44 m/s²
For the greyhound:
Initial velocity = 0 m/s (since the greyhound starts from rest)
Final velocity = 19 m/s
Time = 2.7 s
Plugging these values into the formula, we can calculate the acceleration of the greyhound:
acceleration_greyhound = (19 m/s - 0 m/s) / 2.7 s
acceleration_greyhound = 7.04 m/s²
Therefore, the human sprinter has an acceleration of 4.44 m/s² and the greyhound has an acceleration of 7.04 m/s².