Astone is thrown upward from the top of a building at an angle of 30° to the horizontal and with an initial speed of 20 m/s. the point of release is 45 m above the ground. how long does it take for the stone to hit the ground? what is the stone's speed?

Explanation:

Given

inclination

initial speed

Point of release is 45 m above the ground

Considering stone to be a projectile, so time taken by projectile for its zero vertical displacement is

Now after completing zero vertical displacement , stone needs to travel another 45 m in downward direction with initial speed u=20\sin 30

where,

thus total time time required is

vertical velocity just before hitting

Horizontal velocity

Net velocity Just before hitting

explanation:

a fuel engine ( known as a gasoline engine in american english )is an internal combustion engine with spark ignition, designed to run on petrol (gasoline) and similar volatile fuels.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.