**Answer:**

Answer C : The object's momentum will greatly increase

**Explanation:**

Recall that force and linear momentum are closely related by the equation:

Both, Momentum Change and Force (F) are in the numerator of on either side of the equation, so they are in **direct proportionality**. A large force (force greatly increased) will be the reflection of a large change in momentum.

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**Answer:**

**Explanation:**

The kilogram (abbreviation, kg) is the Standard International (SI) System of Units unit of mass.

**Answers:**

**a) 122.5 m**

**b) 50 m**

**Explanation:**

Here we are dealing with projectile motion, where we can use the following two equations that model the parabolic motion of the stone after being thrown from the window:

**(1)**

**(2)**

Where:

is the height of the stone when it hits the ground

is the initial height of the stone

is the initial velocity of the stone

since we are told the stone was thrown horizontally

is the time the stone is in air

is the horizontal distance the stone travelled

Knowing this, we can answer the questions:

**a)Initial height of the stone:**

In this case we will isolate from **(1)**:

**(3)**

**(4)**

**(5) This is the initial height**

**b) Horizontal distance:**

In this case we will use equation **(2)**:

**(6)**

**(7) This is the horizontal distance**

Using the equation KE=1/2mv^2, plug in the numbers and solve for KE