a man fires a rock of a sling shot upwards. the rock has initial velocity of 15m/s. How long will it take for the rock to reach its highest point??
Use the third equation of motion velocity to displacement
Your initial velocity is 15m/s
Your final velocity is 0m/s
displacement is 0m
substitute the values and solve time
3s
To find out how long it will take for the rock to reach its highest point, we need to first understand the motion of the rock.
When the man fires the rock upwards, it moves against the force of gravity. The initial velocity of the rock is 15 m/s and it's moving vertically upward. Due to the force of gravity, the rock's velocity will decrease until it reaches its highest point where its velocity will become zero.
The time it takes for an object to reach its highest point can be determined using the formula:
t = v / g
where:
t is the time taken
v is the initial vertical velocity
g is the acceleration due to gravity (approximately 9.8 m/s²)
In this case, the initial vertical velocity is 15 m/s. Plugging these values into the formula, we get:
t = 15 m/s / 9.8 m/s²
By dividing the initial velocity by the acceleration due to gravity, we can calculate the time it will take for the rock to reach its highest point.