**Answer: Newton's second law of motion is F = ma or force is equal to the mass the reason this applies to Newton's third law is because When the game starts, both the sides are pulling the rope and neither side is moving. The force on the rope is the same on each side This is Newton's second law of motion which equates force as mass times acceleration.**

**Explanation:**

S=d/t

30/0.75=40

Answer: 40km/h

**Answer:**

**Explanation:**

Given that,

The mass of a bag of acorns, m = 8.5 kg

The force acting on the bag = 80 N

The force of friction = 32 N

We need to find the acceleration of the bag of acorns.

**Net force acting on it is = 80 N - 32 N **

= 48 N

Let a be the acceleration of the bag of acorns. So,

**F = ma**

**So, the acceleration of the bag of acorns is **.

**Answer:**

The elastic limit of a material is the furthest

point it can be stretched or deformed while

being able to return to its previous shape.

**Explanation:**

Once a material has gone past its elastic

limit, its deformation is said to be inelastic.

The higher the spring constant, the stiffer

the spring.

**Answer:**

**a) 12.56 rad per minute**

**b)62.8 inches per minute**

**Explanation:**

Given:

**Radius** of the blades, R=5 inches

**Frequency **of the blades, f=2 revolutions per minute

a)

Let be the angular velocity of the blade which is given by

b)

**Let v be the linear speed of the tip of the blade which is given by**

**Hence we have calculated the angular velocity and linear speed.**