How ya doing today sir I’m sure not too good cuz u ain’t gettin the answer sry
The ball moves by uniformly accelerated motion, and its vertical position at time t is described by the following law
where
is the initial height from which the ball starts its motion
is the initial velocity of the ball
is the gravitational acceleration
The time in which the ball reaches the ground is the time t at which the vertical position y(t) becomes zero:
Which means
whose solutions are:
Neglecting the negative solution (since it has no physical meaning), we can say that the ball reaches the ground after 1.10 s.
Answer:
Wg is positive and WT negative.
(Letters in options are all wrongly written).
Explanation:
Remember that the work of a force is the internal product between the force and the displacement .
Since the displacement is downwards like the weight, the work done by gravity is positive, while the work done by the tension is negative since it points upwards.
Answer:
The branch of physics that is most relevant to football is mechanics, the study of motion and its causes.
Explanation:
When the ball leaves the punter's foot, it is moving with a given velocity (speed plus angle of direction) depending upon the force with which he kicks the ball. The ball moves in two directions, horizontally and vertically. Because the ball was launched at an angle, the velocity is divided into two pieces: a horizontal component and a vertical component.