The mass of the truck<span> first we convert everything into SI units the initial speed=u=32km/hr=8.89 m/s the final speed=v=0m/s time=t=4s we can use the kinematical equation ...</span>
The time of motion of ball A before they collide is 5.1 seconds.
<h3>
Time of motion</h3>
The two balls will collide at a time "t" when they attain a certain height "h".
<h3>The equation of motion</h3>
The equation of motion of the two balls is given as follows;
<em />
<em>when they collide;</em>
- A would have traveled, (t + 4) seconds
- B would have traveled t seconds
Thus, the time of motion of ball A before they collide is (1.1 + 4) = 5.1 seconds.
Learn more about time of motion here: brainly.com/question/2364404
11.86 years, or around that time it would take about 12 years.
Answer:
number protons and force are Q = 1,472 10⁻¹⁷ C F = 3,656 10⁻⁸ N
Explanation:
Atoms are neutral whereby the number of electrons in the atom is compensated by an equal number of positively charged protons in the nucleus, so there are 92 protons, the total charge can be found by a rule of proportions
Q = # proton * 1.6 10⁻¹⁹C
Q = 92 * 1.6 10⁻¹⁹
Q = 1,472 10⁻¹⁷ C
To calculate the force of an electron we use Coulomb's law
F = k q1 Q / r²
F = k e Q / r²
The Coulomb constante is 8.99 10⁹ N m² /C²
F = 8.99 10⁹ 1.6 10⁻¹⁹ 1,472 10⁻¹⁷ / (7.61 10⁻¹⁰)²
F = 3,656 10⁻⁸ N
This force is attractive.