A man is in a walk race. He walks 20km in 6 mins. What is the speed, acceleration and momentum. He weighs 150lbs. He was standing still and then started walking

Answer 1

To calculate the speed, acceleration, and momentum of the man, we need to convert the given information into consistent units.

Distance walked: 20 km
Time taken: 6 mins

To calculate the speed, we use the formula:
Speed = Distance / Time

We need to convert the time into hours as the distance is given in kilometers. There are 60 minutes in an hour, so:
Time taken = 6 mins / 60 = 0.1 hours

Speed = 20 km / 0.1 hours = 200 km/h

Thus, the speed of the man in the race is 200 km/h.

Acceleration is the rate at which the speed of an object changes over time. However, since the time provided is the total time taken for the entire walk race, we cannot determine the acceleration without more information about how the speed changes during the race.

Lastly, momentum is the product of an object's mass and velocity. Given that the weight of the man is 150 lbs, we need to convert it to kilograms. There are approximately 2.205 pounds in 1 kilogram, so:

Weight of the man = 150 lbs / 2.205 lbs/kg ≈ 68 kg

Momentum = Mass x Velocity
Momentum = 68 kg x 200 km/h ≈ 13,600 kg·km/h

Therefore, the momentum of the man is approximately 13,600 kg·km/h.