Gravitation

In the mathematical formula for the Universal Law of Gravitation, what is the correct SI unit for the Universal Gravitational Constant ($G$)?

If the product of the masses of two objects is tripled, and the distance is kept constant, the gravitational force:

What is the value of $G$ on the surface of the Moon compared to the Earth?

A stone is dropped from a height. The Earth pulls the stone, and the stone also pulls the Earth. Why don't we see the Earth moving towards the stone?

Two identical spherical objects, each of mass $M$, are separated by a distance $d$ as shown in the diagram. The initial gravitational force between them is $F$. If $\frac{1}{3}$ of the mass of the first object is transferred to the second object while keeping the distance $d$ constant, what will be the new gravitational force $F'$ between them?

If the gravitational force between two bodies is $1\text{ N}$, and the distance between them is halved while one mass is doubled, the new force will be:

What is the effect on the value of $G$ if the experiment is conducted on the surface of Mars instead of Earth?

The value of $g$ on the surface of the Moon is $1.6\, m/s^2$. What is the weight of a $10\, kg$ object on the Moon?

If the gravitational force between two objects is $100\, N$, and the mass of one object is doubled while the other is tripled, and the distance is kept the same, the new force will be:

If the distance between two masses is doubled, then the gravitational force between them will be:

Why does a piece of paper fall slower than a crumpled ball of paper in air?

An object reaches the maximum height in $3$ seconds. How long will it take to fall back to the ground from that height?

If an object is moving upwards, the direction of acceleration due to gravity is:

The numerical value of $g$ was first calculated using the data from the experiments of:

If an object is dropped from a height $h$, the ratio of the distances covered in the 1st, 2nd, and 3rd seconds of its fall is:

What is the direction of the force of gravity on an object thrown upwards?

Which equation of motion is NOT applicable to a body falling freely under gravity?

A ball is thrown up and reaches a height $h$ in time $t$. What is the ratio of the displacement in the first half of the time $(t/2)$ to the displacement in the second half of the time?

If an object is thrown vertically upwards with a velocity $u$, what is the average velocity of the object for its total journey until it returns to the starting point?

Two bodies $A$ and $B$ have masses $1\,kg$ and $5\,kg$ respectively. They are dropped from the same height. At any point during their fall, the ratio of their accelerations is:

Mass is measured by using which of the following?

If the acceleration due to gravity on Earth is $9.8\text{ m/s}^2$, what is the weight of a $0.5\text{ kg}$ ball?

The ratio of an object's weight on the Moon to its weight on Earth is approx:

If you move from the surface of the Earth to a high altitude in a balloon, your weight will:

An object with an initial mass $m$ has a weight $W$ on a planet where the acceleration due to gravity is $g$. If the object's mass is tripled ($3m$) and it is moved to a location where the acceleration due to gravity is halved ($0.5g$), as shown in the comparison below, what will be the value of its new weight $W_2$?

An object has a weight of $24\text{ N}$ on the surface of the Earth. What will be its weight on the Moon surface? (Use $g_{moon} = 1/6 \times g_{earth}$)

If you buy $1\text{ kg}$ of gold at the equator and take it to the North Pole, what would the vendor at the North Pole observe using a spring balance?

The weight of an object on the Earth is $120\text{ N}$. What will be its weight on Mars if the mass of Mars is $1/10$ that of Earth and its radius is $1/2$ that of Earth?

Two objects of masses $2\text{ kg}$ and $4\text{ kg}$ are dropped from the same height. At any instant during the fall, the ratio of their weights is:

If the mass of a planet is $M$ and its radius is $R$, then the weight of an object of mass $m$ at a depth $R/3$ from the surface is:

The property of fluids to exert an upward force on an object is called ________.

If a force of $50 \text{ N}$ acts on an area of $0.5 \text{ m}^2$, the pressure is:

When a body is weighed in water, its weight ________.

Army tanks usually move over a continuous belt called a track to:

Two bodies of the same material are submerged in a liquid. Body A has a volume of $10 \text{ cm}^3$ and Body B has a volume of $20 \text{ cm}^3$. Which statement is true?

A wooden block of volume $100 \text{ cm}^3$ is floating in water. If $40 \text{ cm}^3$ is above the water surface, the volume of water displaced by the block is:

The pressure exerted by a cube of side $2 \text{ m}$ and weight $2000 \text{ N}$ on the ground is:

The apparent weight of a body in a fluid is equal to:

If the relative density of a substance is $0.5$, it will:

A container holds two immiscible liquids: water (density $1 \text{ g/cm}^3$) and oil (density $0.8 \text{ g/cm}^3$). A block of wood (density $0.9 \text{ g/cm}^3$) is placed in the container. Where will the block settle?

What happens to the level of water in a beaker when a piece of ice floating in it melts?

If an object is partially submerged in water, the buoyant force depends on:

A piece of wood is held under water and then released. It immediately comes to the surface because:

In Archimedes' principle, 'fluid' refers to:

A solid rectangular block is fully submerged in a fluid. The fluid exerts a total downward force of $20\ N$ on the top surface of the block and a total upward force of $35\ N$ on its bottom surface as shown in the diagram. Based on the principle of buoyancy, what is the magnitude of the buoyant force acting on the block?

Which of the following is not a unit of density?

A glass bottle filled with water is placed in a bucket of water. It sinks because:

The weight of a body in air is $50\text{ N}$ and in water is $45\text{ N}$. What is the buoyant force acting on the body in a liquid of relative density $1.2$?

An object of mass $50\text{ g}$ and volume $20\text{ cm}^3$ is placed in water. What is the density of the object, and will it float or sink?

A glass of water has an ice cube floating in it. If the ice cube contains a bubble of air, how will the water level change when the ice melts?