the velocity of the bottle when it strikes the ground can also be found by a one

Question

the velocity of the bottle when it strikes the ground can also be found by a one step or two step method. the two step method consists of first calculating the time when the bottle strikes the ground and using this results to calculate the velocity. a) the time calculation gives two results, t=__________s and t=____________s. the correct result is ___________. what is the physical significance of the second results ? ( +3.00s, -1.57s) b) the velocity calculated using this time is___________ m/s (-22.4 m/s)

given

a= -9.8 m/s^2

x0=23 m

v0=7m/s

v=0

x=25.5

Explanation / Answer

the correct result is the positive value of time = 3 sec

the negative value of time indicates that time can not be negative and hence we can ignore this value.

V = Vo + at

V = 7 + (- 9.8) (3) = - 22.4 m/s

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.