Respuesta :
Answer:
the ball takes 1.53 s to reach the top of its trajectory.
Explanation:
given information:
the speed, v = - 15 m/s (moving upward)
(a) How much time does it take for the ball to reach the top of its trajectory?
we know that the speed for the vertical motion is
v = v₀ - gt, v₀ = 0
where
v = speed (m/s)
g = gravitational force (9.8 m/s²)
t = time (s)
thus
v = - gt
-15 = - 9.8 t
t = 15/9.8
= 1.53 s
so, the time that is needed by the ball to reach the top its trajectory is 1.53 s
Answer:
The ball takes 1.53 seconds to reach its top trajectory
Explanation:
The velocity of the ball will keep pushing it upwards until the velocity becomes zero. Therefore, the ball will reach the top of its trajectory when velocity i.e. V=0,
Fundamental principal of velocity is V = Vo + g*t
where, V=0
Vo = 15 m/s
g = -9.8 m/s^2 (since ball is going upwards against the gravity)
t = ?
0 = 15 + (-9.8 * t)
-15 = -9.8t
-15 / -9.8 = t
t = 1.53 Seconds
The ball takes 1.53 seconds to reach its top trajectory