Answered

Question 1 1 / 1 point
Kinetic energy is the energy of

Question options:

mass


motion ******


work


speed

Question 2 1 / 1 point
What two factors determine an objects kinetic energy?

Question options:

mass and speed ********


size and speed


height and speed


mass and height

Question 3 1 / 1 point
Kinetic energy can be passed from one object to another when objects collide,

Question options:
True ********
False
Question 4 1 / 1 point
A 50 pound boy is moving at a speed of 5 miles per hour and a 30 pound girl is moving as a speed of 5 miles per hour, who has the greatest kinetic energy?

Question options:

the boy ******


They both have the same kinetic energy


The girl


There is not enough information to determine who has the most kinetic energy

Question 5 1 / 1 point
Think about a girl on a swing. When is the kinetic energy of the girl zero?

Question options:

when she stops moving at the top of the swing ********


it is never zero


when the girl is swinging backwards


at the bottom of the swing

Question 6 1 / 1 point
If a car is at a stop sign it has kinetic energy.

Question options:
True
False *******
Question 7 1 / 1 point
One object has a speed of 1 mph and another object has a speed of 3 mph. If the masses are the same, which of the following is true about their kinetic energy?

Question options:

the object greater speed has the lower kinetic energy


the object with the greater speed has greater kinetic energy *****


Their speeds are the same.


the object with the smaller mass has the greater kinetic energy

Answer :

Zigg11
1. Motion

2. Mass and Speed

3.True

4. The Boy

5. When she stops moving at the top of the swing

6. False

7. The object with the greater speed has greater kinetic energy

Trust Me I Took The Test And Got Everything Right.

I would appreciate a BRAINLIEST.
zainebamir540

Answer to Q 1

Kinetic energy is the energy of motion

Explanation:

The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. It is denoted by 1/2 mv².


Answer to Q2

The correct option is mass and speed

Explanation:

As stated earlier that kinetic energy of an object is the energy that it possesses due to its motion. Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v². If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.


Answer 3

The statement is True

Explanation:

Kinetic energy is a form of energy and we know that energy can be transferred from one body to another and the total amount of energy remains constant. Therefore Kinetic energy can also be transferred to another body as the molecules hits the next molecules and they transfer their energy to one another.


Answer to Q4

Boy has more kinetic energy

Explanation:

As KE is given by the equation

K.E = 1/2 mv²

So Solving for boy first

K.E = 1/2 (50) (5)² = 625

Now solving for girl

K.E = 1/2 (30) (5)² = 375

So boy has more kinetic energy


Answer to Q5:

The kinetic energy is zero when  she stops moving at the top of the swing

Explanation:

Kinetic energy is the energy produced by the motion of the object and when the object is not moving so we consider the kinetic energy as zero. When the girl swings and the swing reaches its top point, it stops for a moment and then comes back so the point where the swing stops moving the kinetic energy is zero.


Answer to Q 6:

The statement is False

Explanation:

As discussed earlier Kinetic energy is the energy produced by the motion of the object and when the object is not moving so we consider the kinetic energy as zero. Since the car at stops sign is not moving so its kinetic energy is also zero.


Answer to Q7:

The object with the greater speed has greater kinetic energy

Explanation:

As KE is given by the equation

K.E = 1/2 mv²

so kinetic energy is dependent upon the product of mass and speed. If any of them increases, the result increases hence the object with more speed has more kinetic energy.


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