Answer:
0.00354 (N)
Explanation:
Convert to metric system:


Formula for gravitational force:

where s is the distance between 2 bodies masses m and M
Substitute the number to the formula above and since the 2 forces are acting in opposite direction, the total net gravitational force on the mass of origin be:






A real image is smaller than the object
Answer:
Explanation:
We are looking for final velocity. Since the ball is thrown horizontally, there is no upwards velocity, so the y dimension here is only useful to us for finding how long the ball was in the air. In the y dimension, here's what we know:
a = -9.8 m/s/s
Δx = -59 m
(again, initial upwards velocity is 0 because the ball was thrown horizontally)
We can put all that together in the equation:
Δx =
and filling in:
which simplifies to
and solving for t:
and
t = 3.5 sec
Now we can use that time in the d = rt equation, which is all we need for the horizontal dimension (I'll show you why in just a second). In the horizontal dimension, here's what we know:
a = 0 m/s/s
Δx = 65 m
t = 3.5 sec
Putting that all together in our one-dimensional equation for displacement:
Δx =
and acceleration is 0, we can simplify that down to
Δx =
which is the exact same thing as d = rt where r is the velocity we are looking for. Filling in:
65 = v(3.5) so
v = 18.6 m/s
That's the velocity with which the ball strikes the ground.
<span>To produce a charge of 1.15 Coulombs in an object, we need to transfer = 1.15/(charge on an electron) number of electrons
As we know that, total charge on an electron = 1.60217662 Ă— 10 ^-19 coulombs
Hence, number of electrons required to move = 1.15/(1.60217662 Ă— 10 ^-19)
= 0.71777 x 10^19 electrons, i.e. 7.17 x 10^18 electrons upto 3 significant figures</span>