A stone dropped from the roof of a single story building to the surface of the earth: reaches a maximum speed quite soon after release and then falls at a constant speed thereafter. speeds up as it falls because the gravitational attraction gets considerably stronger as the stone gets closer to the earth. speeds up because of an almost constant force of gravity acting upon it. falls because of the natural tendency of all objects to rest on the surface of the earth. falls because of the combined effects of the force of gravity pushing it downward and the force of the air pushing it downward.
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
Q3: A stone dropped from the roof of a single story building to the surface of the earth:
- reaches a maximum speed quite soon after release and then falls at a constant speed thereafter.
- speeds up as it falls because the gravitational attraction gets considerably stronger as the stone gets closer to the earth.
- speeds up because of an almost constant force of gravity acting upon it.
- falls because of the natural tendency of all objects to rest on the surface of the earth.
- falls because of the combined effects of the force of gravity pushing it downward and the force of the air pushing it downward.
- the truck exerts a greater amount of force on the car than the car exerts on the truck.
- the car exerts a greater amount of force on the truck than the truck exerts on the car.
- neither exerts a force on the other, the car gets smashed simply because it gets in the way of the truck.
- the truck exerts a force on the car but the car does not exert a force on the truck.
- the truck exerts the same amount of force on the car as the car exerts on the truck.
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