Sofia Rodas, Jose Jui, Carlos Pineda - Gravitational Motion, Rotational Motion, Work, Energy.

Question 1

Remember: Gravitational Motion:

What is the definition of gravity?

Answer 1

A force that pulls two objects towards each other.

Question 2

Remember: Rotational Motion:

What is the definition of rotational motion?

Answer 2

It is an object’s motion around a circular path, in a fixed orbit

Question 3

Remember: Work:

What is the definition of work?

Answer 3

It is the energy transferred from one object to another by an external force along a displacement.

Question 4

Remember: Energy:

What is the definition of energy?

Answer 4

It is the work that a force can do.

Question 5

Remember: Gravitational Motion:

What is the definition of motion?

Answer 5

An object’s change in position over time.

Question 6

Identify: Rotational Motion:

What are the units of acceleration in rational motion?

Answer 6

rad/s^2

Question 7

Identify: Work:

What is the formula of work? What is its SI unit?

Answer 7

Formula: W=Fs

SI Unit: J (joules)

Question 8

Identify: Energy:

What is the formula for Kinetic Energy (KE)?

Answer 8

KE= 1/2mv^2

Question 9

Identify: Gravitational Motion:

What is the formula of gravitational motion?

Answer 9

Fg=(Gm1m2)/(r^2)

Question 10

Identify: Rotational Motion:

What is the unit of displacement?

Answer 10

radians (rad)

Question 11

Calculation: Work: A person pulls a block 4 m along a horizontal surface with a constant force F = 30 N. Determine the work done by the force F acting on the block.

Answer 11

W = F d cos θ = (30)(4)(cos 0) = (30)(4)(1) = 120 Joules.

Question 12

Calculation: Energy: An object of mass 6 kg is brought to a height of 8 m from the ground g = 15ms. Find the potential energy stored in the object.

Answer 12

The potential energy is = 6815 = 720J. Equation: U =mgh.

Question 13

Calculation: Gravitational Motion: An object is dropped, with no initial velocity, onto the surface of the planet Neptune and falls 15.5 meters in 5 seconds. What is the acceleration of the falling object?

Answer 13

Acceleration of the falling object: 215.5/5^2= 1.23m/s^2. Equation: a = 2d/t^2.

Question 14

Calculation: Rotation Motion: What is the moment of inertia of a sphere?

Answer 14

The moment of inertia of a sphere is: I = (⅖ )MR2

Question 15

Calculation: Work: A body falls from a height of 8 m. If acceleration due to gravity is 20 m/s^2, determine the work done by the force of gravity.

Answer 15

W = F d cos θ = (20)(8)(cos 0) = (1)(8)(20)= 160 Joules

Question 16

Understand: Energy: Based on all the flashcards and your understanding, what is energy?

Answer 16

Energy is the capacity to move an object by the application of force. Energy can exist in a variety of forms, such as electrical, mechanical, chemical, thermal, or nuclear, and can be transformed from one form to another.

Question 17

Understand: Gravitational Motion: Based on all the flashcards and your understanding, what is Gravitational Motion?

Answer 17

Gravitational Motion is the force of attraction that bodies exert on one another as a result of their mass.

Question 18

Understand: Rotational Motion: Based on all the flashcards and your understanding, what is Rotational Motion?

Answer 18

Rotational motion is the description of relationships between the angle of rotation, angular velocity, angular acceleration, and time.

Question 19

Understand: Work: Based on all the flashcards and your understanding, what is Work?

Answer 19

Work is the product of the component of the force in the direction of the displacement and the magnitude.

Question 20

Understand: Energy:

Question 21

Gravitational Motion:

Provide an example of gravitational motion:

Answer 21

The force that causes a ball that you through in the air to come down again.

Question 22

Rotational Motion:

Provide an example of rotational motion:

Answer 22

The motion of wheels, gears, motors, etc. For example, the motion of a Ferris wheel an amusement park.

Question 23

Work:

Provide an example of work:

Answer 23

Pushing a box horizontally from rest.

Question 24

Energy:

Provide an example of energy:

Answer 24

Energy exists in many different forms. Examples of these are: potential energy, kinetic energy, light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, and nuclear energy.

Question 25

Gravitational Motion:

Does the strength of the gravitational motion change base on different effects?

Answer 25

Yes, as the strength of the gravitational motion can be different based on different effects like a different gravitational force.

Question 26

Rotational Motion:

Can rotational force affect objects that are not circular in nature?

Answer 26

Yes, as an object just needs to move in a circular manner, they don’t necessarily need to be a circular object.

Question 27

Work:

Can work affect an object by moving it vertically?

Answer 27

No, work is only when an object is moved from rest horizontally.

Question 28

Energy:

Can energy be created? Can energy be destroyed?

Answer 28

No, energy can only be transformed into other energy types.

Question 29

Gravitational Motion:

Can gravitational motion exist in areas in zero gravity?

Answer 29

No, as there needs to be gravity in order for it to be considered gravitational motion.

Question 30

Rotational Motion:

Can rotational motion work in other shapes that aren’t circular?

Answer 30

No, the objects need to move in a circular motion, because objects can’t move around a fixed point that isn’t in a circular motion.