The answer is D. Current.
Answer: Although the gravitational force the Earth exerts on the objects is different, their masses are just as different, so the effect we observe (acceleration) is the same for each. The Earth's gravitational force accelerates objects when they fall. It constantly pulls, and the objects constantly speed up.
Answer:
The results of this experiment is that the vast majority of the particles were very little deviated,
Explanation:
Rutherford's experiment consisted of making alpha particles that are helium nucleus with two positive charges on a thin sheet of gold.
The results of this experiment is that the vast majority of the particles were very little deviated, which agrees that the charge and mass of the electrons is small, so their repulsion is very small
A few particles are strongly deviated and much less highly deviated almost
back off, this allowed us to suggest that the positive charge and mass was concentrated in a very small area of space, which I call nucleus
The body will take 20 seconds to cover a distance of 1000 m i.e. 1 km
<h3><u>
For the aceleration:</u></h3>
First, let's find the resultant, and <u>applicate 2nd law of Newton</u> using the resultant, so:
R = ma
F - Ff = ma
Data:
F = Force = 1150 N
Ff = Friction force = 490 N
m = Mass = 150 kg
a = Aceleraction = ?
Replacing according our data:
1150 N - 490 N = 150 kg * a
660 N = 150 kg * a
660 N / 150 kg = a
a = 4,4 m/s² ← Aceleration of the object
<h3><u>For the normal force:</u></h3>
The normal force IS NOT the resultant force, the normal force's the force between the ground and the object, in another words, is the weight of the object, and for the weight:
w = mg
w = 150 kg * 10 m/s²
w = 1500 N ← Normal force between object and ground.