A projectile is fired straight up at a speed of 15 m/s.
How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 .
To find the time it takes for the projectile to reach the top of its motion, we can use the equation of motion for vertical motion:
v = u + at
Where:
v = final velocity (which is 0 m/s at the top of the motion)
u = initial velocity (15 m/s in this case, as the projectile is fired straight up)
a = acceleration (in this case, acceleration due to gravity, which is -9.8 m/s^2 since it acts downward)
t = time
Rearranging the equation, we have:
t = (v - u) / a
Substituting the values, we have:
t = (0 - 15) / (-9.8)
t = (-15) / (-9.8)
t ≈ 1.53 seconds
Therefore, it takes approximately 1.53 seconds for the projectile to reach the top of its motion.
well, it starts off at 15m/s
Every second, it loses 9.8m/s
How long does it take to lose the whole 15 m/s?
Yes, it really is as easy as it seems.