Answer:
### Kinetic energy :

The ** block's kinetic energy** is closest to 1500 Joules.

The energy is always **conserved.**

So that, the total kinetic energy will be sum of initial potential energy and kinetic energy during falling.

** Given **that, mass(m)=10kg, v=10m/s, h=10m,g=10m/s^2

K.E=(1/2)mv^2 + mgh

K.E=(1/2)*10*100 + (10*10*10)

K.E=500 + 1000=1500Joule

The block's kinetic energy is closest to 1500 Joules.

Learn more about the** kinetic energy** here:

Answer:

**Answer:**

**Kinetic energy = 1500 J**

**Explanation:**

The computation of the block's kinetic energy is shown below:

As we know that

Conservation of energy is

PE_i + KE_i = PE_f + KE_f

where,

Initial Potential energy = PE_i = m gh = 10kg× 10m/s^2 × 10m = 1000 J

Initial Kinetic energy = KE_i = (0.5) m V^2 = (0.5) (10 kg) (10 m/s)^2 = 500 J

Final potential energy = PE_f = mgh = 0

As h = 0 which is at reference line

So

PE_i + KE_i = PE_f + KE_f

Now put these valeus to the above formulas

1000 J + 500 J = 0 + KE_f

After solving this

**Kinetic energy = 1500 J**

What is the magnitude of the force needed to hold the outer 2 cm of the blade to the inner portion of the blade?

An object has an average acceleration of +6.07 m/s2 for 0.250 s . At the end of this time the object's velocity is +9.64 m/s .What was the object's initial velocity?

As an object in motion becomes heavier, its kinetic energy _____. A. increases exponentially B. decreases exponentially C. increases proportionally D. decreases proportionally

If you are lying down and stand up quickly, you can get dizzy or feel faint. This is because the blood vessels don't have time to expand to compensate for the blood pressure drop. If your brain is 0.4 m higher than your heart when you are standing, how much lower is your blood pressure at your brain than it is at your heart

A train of 150 m length is going toward north direction at a speed of 10 ms–1 and a parrot is flying towards south direction parallel to the railway track with a speed of 5 ms–1. The time taken by the parrot to cross the train is equal to.?

An object has an average acceleration of +6.07 m/s2 for 0.250 s . At the end of this time the object's velocity is +9.64 m/s .What was the object's initial velocity?

As an object in motion becomes heavier, its kinetic energy _____. A. increases exponentially B. decreases exponentially C. increases proportionally D. decreases proportionally

If you are lying down and stand up quickly, you can get dizzy or feel faint. This is because the blood vessels don't have time to expand to compensate for the blood pressure drop. If your brain is 0.4 m higher than your heart when you are standing, how much lower is your blood pressure at your brain than it is at your heart

A train of 150 m length is going toward north direction at a speed of 10 ms–1 and a parrot is flying towards south direction parallel to the railway track with a speed of 5 ms–1. The time taken by the parrot to cross the train is equal to.?

B. John is correct, but Linda is wrong

C. John is wrong, but Linda is correct

D. They are both correct.

E. John must be wrong, because Linda always wins these arguments.

Answer:

They are both correct.

Explanation:

The density of an object is defined as the ratio of its mass to its volume. This implies that the density of the object is both proportional to the mass and also to the volume of the object. John only mentioned mass which is correct. Linda mentioned the second variable on which density depends which is the volume of the object.

Hence considering the both statements objectively, one can say that they are both correct.

**Answer:**

**Yes, the paths of the two particles cross.**

**Location of path intersection = ( 1 , 2 , 3)**

**Explanation:**

In order to find the point of intersection, we need to set both locations equal to one another. **It should be noted however, that the time for each particle can vary as we are finding the point where the ****paths**** meet, not the point where the particles meet themselves.**

So, we can name the time of the first particle , and the time of the second particle .

Setting the locations equal, we get the following equations to solve for and :

**Equation 1**

**Equation 2**

**Equation 3**

**Solving these three equations simultaneously we get:**

2 seconds

4 seconds

Since, we have an answer for when the trajectories cross, we know for a fact that they **indeed do cross.**

**The point of crossing can be found by using the value of ****or ****in the location matrices. Doing this for the first particle we get:**

**Location of path intersection = ( -1 + 2 , 4 - 2 , -1 + 2(2) )**

**Location of path intersection = ( 1 , 2 , 3)**

Measure the circumference of the tire before and after riding.

B.

Measure the total distance traveled on his bike and divide this by how long it took him.

C.

Measure the wear on his treads before and after riding a certain number of laps.

D.

Time how long it takes him to ride 5 laps around his cul-de-sac.

Answer:

C.

Measure the wear on his treads before and after riding a certain number of laps.

**Answer:**

Measure the wear on his treads before and after riding a certain number of laps.

**Explanation:**

By riding in a circular motion the inside of the tire will be in contact with the road more than the outside of the tire. Thus, to see if the constant circular motion had any effect on his tires David should measure the tread depth on both the inside and the outside of the tires before the experiment and measure the inside and the outside of the tires (at the same location on the tires) after the experiment. Then he can compare the tread loss on the inside of the tire to the tread loss on the outside of the tire.

**Answer:**

128 is the ans cuz N is also lnown as mass

**Explanation:**

128

B. 60 cm

C. 75 cm

D. 90 cm

B. 60 cm

All parallel light rays are bent through the focal point of a convex lens, so the rays from the flashlight 150 cm above the floor must go through the same point on the principal axis as the rays from the flashlight 120 cm above the floor. The location of the focal point does not change when the position of the object is moved either vertically or horizontally.

All parallel light rays are bent through the focal point of a convex lens, so the rays from the flashlight 150 cm above the floor must go through the same point on the principal axis as the rays from the flashlight 120 cm above the floor. The location of the focal point does not change when the position of the object is moved either vertically or horizontally.

**Answer:**

The amplitude of oscillation for the oscillating mass is 0.28 m.

**Explanation:**

**Given that,**

Mass = 0.14 kg

Equation of simple harmonic motion

....(I)

**We need to calculate the amplitude**

**Using general equation of simple harmonic equation**

Compare the equation (I) from general equation

The amplitude is 0.28 m.

**Hence, The amplitude of oscillation for the oscillating mass is 0.28 m.**