Gravity Review

Front

What is the formula for calculating gravitational force between two masses?

Back

F = G * (m1 * m2) / r^2, where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses, and r is the distance between their centers.

Front

What happens to the gravitational force if the distance between two objects is doubled?

Back

The gravitational force becomes 1/4 of its original value, as it is inversely proportional to the square of the distance.

Front

Define gravitational field strength.

Back

Gravitational field strength is the force per unit mass experienced by a small test mass placed in the field, measured in N/kg.

Front

How does gravitational field strength change with altitude?

Back

Gravitational field strength decreases with altitude, as the distance from the center of the Earth increases.

Front

What is the gravitational field strength at the surface of the Earth?

Back

Approximately 9.81 N/kg.

Front

If an object has a mass of 10 kg, what is its weight on the surface of the Earth?

Back

Weight = mass * gravitational field strength = 10 kg * 9.81 N/kg = 98.1 N.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as weight = mass * gravitational field strength.

Front

What is the gravitational force between two 8000 kg and 1500 kg masses separated by 1.5 m?

Back

3.6 X 10^-4 N.

Front

What is the effect on gravitational force if the mass of one object is tripled?

Back

The gravitational force increases by a factor of three, as it is directly proportional to the mass.

Front

What is the false statement regarding gravity?

Back

Only really large objects have gravity.