A man walks 20km in less than 7 minutes. What is the speed, acceleration and momentum
First, let's address the inconsistency in the question. It is not possible for a man to walk 20km in less than 7 minutes. Walking such a distance would take a considerable amount of time, even for an Olympic-level runner.
However, in general, we can calculate the speed, acceleration, and momentum of an object given the necessary information.
Speed is a measure of how fast an object is moving and is calculated by dividing the distance traveled by the time taken. For example, if a man walks 20km in 2 hours, his speed would be 20km/2h = 10km/h.
Acceleration is the rate of change of velocity and is calculated by dividing the change in velocity by the time taken. Velocity is the speed in a given direction. If the speed of an object changes uniformly over time, the acceleration can be calculated by dividing the change in speed by the time taken.
Momentum is a vector quantity that represents the motion of an object and is calculated by multiplying the mass of the object by its velocity.
Since the example provided is not realistic, we cannot calculate the exact speed, acceleration, and momentum.