Answer:
a. when the acceleration of the objects become negative
I dont really know but i think the first one is true super sorry
kinetic energy is given as
KE = (0.5) m v²
given that : v = speed of the bottle in each case = 4 m/s
when m = 0.125 kg
KE = (0.5) m v² = (0.5) (0.125) (4)² = 1 J
when m = 0.250 kg
KE = (0.5) m v² = (0.5) (0.250) (4)² = 2 J
when m = 0.375 kg
KE = (0.5) m v² = (0.5) (0.375) (4)² = 3 J
when m = 0.0.500 kg
KE = (0.5) m v² = (0.5) (0.500) (4)² = 4 J
Answer:
B) 3.33 m/s²
Explanation:
Given that,
The initial velocity of Juan, u = 10 m/s
Final velocity of Juan, v = 60 m/s
Time taken, t = 15 s
The acceleration is given by the relation
a = v-u/t m/s²
Substituting in the above equation
a = 60 - 10 / 15
a = 3.33 m/s²
Hence, the acceleration of the Juan is, a = 3.33 m/s²
