you would have to look up the formula and know what time and how fast and how far
Answer:
Light shone on metal expulses electrons from its surface. This phenomenon is the photoelectric effect, and the electrons are called photoelectrons. Experiments indicate that by increasing light frequency, the kinetic energy of the photoelectrons increases, and by intensifying the light, the current increases
A. The truck exerts a greater force on the car than the car exerts on the truck.
Answer:
Explanation:
The equations for the horizontal and vertical position of the ball are, respectivelly:
By isolating each trigonometric component and summing each equation:
The positive real roots are:
The needed angle is:
To solve this problem it is necessary to apply the concepts related to energy conservation. Therefore, the work done will initially be equivalent to the change in kinematic energy. And this kinematic energy will be equivalent to the sum of energy (work) carried out by force and friction. In this way we have to
Now,
For each one we have
Then at the equation of equilibrium of energy we have,
Therefore the work done by friction on the chair is -833.7J