Answer:
<h3><em>
28.01m/s.</em></h3>
Explanation:
Given maximum height reached by the ball as H = 40 metres
Since the ball rises straight up when hit by a ball, then the angle of launch will be perpendicular to the ground and that is 90°.
To determine the upward speed of the ball in meters per second after it got struck by the bat, we will use the formula for calculating the maximum height according to projectile motion;
Maximum Height H =
where;
u is the speed of the ball
is the angle of launch
g is the acceleration due to gravity = 9.81m/s²
Substituting the given parameters into the formula;

<em>Hence the upward speed of the ball in meters per second after it got struck by the bat is 28.01m/s.</em>
First of all, we can calculate the frequency of the photon, which is related to the wavelength by the following equation:

where c is the speed of light and

is the photon wavelength. Substituting into the formula, we find the frequency

Now we can find the energy of the photon with the following equation:

where h is the Planck constant. Substituting numbers, we find
The momentum does not change because he is going the same speed just a different way.
Gram is used for measuring weight