Science questions in short. [2 marks ]

At higher altitude the atmospheric pressure decreases therefore the blood vessels exceed the outside pressure which causes blood vessels to get rupture.

The two broad categories of forces are: Contact force: It is a force where physical contact between two objects is required. For example: Muscular force, friction. Non-contact force: This force does not require any physical contact between the objects. For example: gravitational force, magnetic force.

Interaction between two objects is required for a force to come into play. The interaction of one object with other results in a force between two objects but no physical contact is necessary.

The state of motion of an object is define by the speed acquired by it in a particular direction. Force can change the state of motion of an object.

Camels have padded feet that imply that its feet have more area. So when they walk on the sand, their body exerts less pressure on the sand which prevents them from sinking and thus helps them to walk.

Atmospheric pressure refers to the number of air molecules per unit area. As we go to higher altitude, the number of air molecules decreases which results in a decrease in the magnitude of force exerted by them. So the atmospheric pressure will be greater at ground level.

A sharp axe has a sharp edge which means edge has a minimum area as compared to the rest of the axe. As the area is small, the pressure is large and thus easier to cut trees. Whereas blunt axe has larger edge thus exerting less pressure and hence it takes time to cut trees.

The magnitude of forces will be equal and it acts in opposite direction, so that they are cancelling each other. We can understand this by using the following diagram:

When a force is applied to an object at rest or in motion, it changes the speed and direction of motion of the object resulting in the object coming to rest or in motion in other direction with some different speed than the initial one. Therefore, a change in the speed of the object and the direction of motion of the object is referred as change in the state of the object.