the correct choice is

**The buoyant force is greater on the rock in water**

Explanation :

The buoyant force acting on a rock completely submerged in a fluid is given as

F = ρ V g

here F = force of buoyancy

V = Volume of fluid displaced by the rock (in case of object completely inside the fluid, the volume of fluid displaced is same as the volume of object)

g = acceleration due to gravity.

from the formula , the force of buoyancy "F" in upward direction is directly proportional to the density of fluid displaced. that is , greater the density of fluid , greater will be the force of buoyancy.

we know that density of water > density of air.

hence the rock experience greater force of buoyancy inside water as compared to when in air.

greater force of buoyancy inside water makes it easier to lift the rock in water.

**Answer with Explanation:**

We are given that

Initial velocity,u=4.5 m/s

Time=t =0.5 s

Final velocity=v=0m/s

We have to find the deceleration and estimate the force exerted by wall on you.

We know that

**Acceleration=**

Using the formula

Acceleration=

**deceleration=a=**

We know that

**Force =ma**

Using the formula and suppose mass of my body=m=40 kg

The force exerted by wall on you

**Force=**

**Answer:**

**Explanation:**

= Mass of Bonzo

= Mass of Ender

= Initial Velocity of Bonzo = 2.2 m/s

= Initial Velocity of Ender = -2.6 m/s

From conservation of linear momentum

The channel is whatever was used to carry information from

one place to another, or from one person to another.

In this scenario, the channel is e-mail.

**Answer:**

When elements bond together or when bonds of compounds are broken and form a new substance

**Explanation:**