# GENERAL KNOWLEDGE

## GK

### PHYSICS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The force of gravity between you and Earth is greater than the force of gravity between you and a car because Earth has more ____ than the car.
 A mass B density C force D friciton
Explanation:

Detailed explanation-1: -The force of gravity between you and Earth is greater than the force of gravity between you and a car because Earth has more MASS than the car. According to Newton’s third law of motion, the strength of a reaction force is EQUAL TO the strength of the action force.

Detailed explanation-2: -The Sun’s gravity is about 27.9 times that of Earth, and, in a small way, it helps to control the tides on Earth.

Detailed explanation-3: -Hence, magnitude of the gravitational force (F) between the earth and the body is given by, F=GM×mR2=6.67×10−11×6×1024×1(6.4×106)2 = 9.77 N = 9.8 N (approx).

Detailed explanation-4: -Newton’s law of universal gravitation states that the force of gravity affects everything with mass in the universe. Newton’s law also states that the strength of gravity between any two objects depends on the masses of the objects and the distance between them.

Detailed explanation-5: -The greater an object’s mass, the more gravitational force it exerts. So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive.

There is 1 question to complete.