A toy rocket is launched straight up, At the exact to of its' flight path, which of the followings is true?
A. Its velocity and acceleration are zero
B. Its velocity is zero and acceleration is 9.8 m/s2
C. Its velocity is 9:8 m/s and acceleration is zero
D. Its velocity is 9.8 m/s and acceleration is zero
সঠিক উত্তরঃ
B.
Its velocity is zero and acceleration is 9.8 m/s2