Asky diver steps from a high-flying helicopter. if there were not air resistance, how fast would she be falling at the end of a 12 second jump?

If there is no air resistance and the body, in this case the sky diver simply falls from the helicopter then, the motion can be described as a free-falling body. The equation that would allow us to determine the speed of the body at any time, t is,

                                    v(t)  = vo + gt

where v(t) is the unknown velocity, vo is the initial velocity which is equal to zero and g is the acceleration due to gravity which is equal to 9.8 m/s2.

Substituting the known values,

                                    v(t) = 0 + (9.8 m/s2)(12s)

                                                v(t) = 117.6 m/s

Hence, the speed of the sky diver at the end of 12 second is approximately 117.6 m/s.  

temp rises, and expansion

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles