Answer: towards the mass
Explanation: We know that the gravitational force is a long range force which is always attractive in nature.
Given that:
- mass
- mass
- mass
The masses are positioned on X-axis at the following points:
- Position of mass
- Position of mass
- Position of mass
Mathematically:
<em>Gravitational force on mass </em><em> due to mass </em><em> is given by </em>
...................(1)
- where: = the radial distance between masses & =3
Similarly, g<em>ravitational force on mass </em><em> due to mass </em><em> is given by </em>
............................(2)
- where: = the radial distance between masses & =3
Now, put the respective values in the above equations.
Again,
∵Mass is in the middle of the masses & therefore the forces & will attract them in radially opposite direction.
∴ towards the mass
It is a surface force
<span />
Answer: A.
Explanation: Roughly 180 - 200 million years ago, just before the first dinosaurs evolved. Mammals themselves evolved from a group or reptiles which exhibited mammal-like traits. One of them was specialized teeth. Reptiles tend to have teeth all the same shape. The mammal-like reptiles evolved tiny teeth in front of the jaw and two pairs of over sized fangs along the the sides. Like modern mammals, the head was large in proportion to the rest of the body. The jaws were also evolving another mammal trait, the ability to move sideways. Despite the lack of specialized teeth, acute hearing and the ability to chew, the dinosaurs evolved an adaptation which made them far more successful than mammals--modified leg bones. These limbs could be articulated directly under their bodies. This enabled the legs to support more weight, since the limbs were now under the body instead of at the sides. Then dinosaurs did something which secured their dominance for the next 120 million years - they began to stand on two legs. Although the back was still parallel to the ground, running on two legs greatly increased the dinosaur's speed. Mammals could simply not compete with swift, giant predators and were forced to remain small, and most became nocturnal to evade dinosaurs which were probably active during the day. Despite that they managed to survive which allowed the further evolution of mammals into us, humans.
Answer:
100
Explanation:
by dividing 2000N and 1000kg.