Soalan # 4148c

Soalan # 4148c
Anonim

Jawapan:

# v_0 = 7 m / s "(" v_0 "= halaju awal dalam m / s)" #

#a = 6 m / s ^ 2 "(a = pecutan m / s²)" #

Penjelasan:

#x (t) = v_0 * t + a * t ^ 2/2 #

# => x (n) - x (n-1) = v_0 + (a / 2) * (n ^ 2 - (n-1) ^ 2)

# = v_0 + (a / 2) (2 * n-1) #

# = v_0 - a / 2 + a * n #

# = 4 + 6 * n #

# => v_0 - a / 2 = 4 ", dan a = 6." #

# => v_0 = 7 #