42. Suppose it takes you 20 min. to walk a mile, and you have trained yourself t

Question

42. Suppose it takes you 20 min. to walk a mile, and you have trained yourself to the point where you can walk steadily and maintain that same rate, day after day, for about five hours a day. Since you really, really like walking, you decide to walk across America. Assuming the distance from one coast to the opposite coast is about 3000 miles, estimate how long would it take you to complete the journey A. one month B. seventeen days C. one year D. seven years E. seven months 43. Which of the following is a valid unit for momentum? A. kg-m/s B. kg-m/s C. N-m D. kg-m E. kg/m2

Explanation / Answer

42.

Number of miles walked in a hour =60/20 =3 miles

Number of miles walked in 5 hours= 5*3=15 miles

Number of days it takes to walk 3000 miles is

N=3000/15 =200 days

in months

N=200/30 =6.6667 months

N=7 months

43.

Units of mass are given by kg

units of speed is given by m/s

Momentum is given by

P=mV

Therefore

P=Kg-m/s

Answer is A)Kg-m/s

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