Gravitation Worksheet8

State the kepler’s law which is represented by the relation r^{3} ∝ T^{2}.

Which of the Kepler's laws of planetary motion led Newton to establish the inversesquare rule for gravitational force between two bodies ?

Name the property of earth which is responsible for extremely small acceleration being produced in it as a result of attraction by other small objects.

What is the acceleration produced in a freely falling body of mass 10 kg ? (Neglect air resistance)

When an object is dropped from a height, it accelerates and falls down. Name the force which accelerates the object.

Give the formula for the gravitational force F between two bodies of masses M and m kept at a distance d from each other.

What force is responsible for the earth revolving round the sun ?

What name has been given to the force with which two objects lying apart attract each other ?

What type of force is involved in the formation of tides in the sea?

Which force is responsible for holding the solar system together ?

What is the weight of a 1 kilogram mass on the earth ? (g = 9.8 m/s^{2}).

On what factor/factors does the weight of a body depend ?

As the altitude of a body increases, do the weight and mass both vary ?

If the same body is taken to places having different gravitational field strength, then what will vary: its weight or mass ?

If the mass of an object be 5 kg, what is its weight ? (g = 9.8 m/s^{2}).

The weight of a body is 50 N. What is its mass ? (g = 9.8 m/s^{2}).

A body has a weight of 10 kg on the surface of earth. What will be its weight when taken to the centre of the earth ?

Write down the weight of a 50 kg mass on the earth. (g = 9.8 m/s^{2}).

If the weight of a body on the earth is 6 N, what will it be on the moon ?

Explain what is meant by the equation:
where the symbols have their usual meanings.
Answer:

The cube of the mean distance of a planet from the sun is directly proportional to the square of time it takes to move around the sun

Kepler’s third law

Extremely large mass of earth

9.8 m/s^{2}

Gravitational force (of earth)


Gravitational force

Gravitational force

Gravitational force exerted mainly by the moon.

Gravitational force (of the sun)

9.8 N

Mass of the body as W = mg

Weight varies; Mass does not vary

Weight

49 N
W = mg

W = mg 5.102 kg

–

Using w = mg
490 N

About 1 N

–