Force and Energy

Question 1

What is gravity

Answer 1

the force that pulls us to an object, the bigger the object the stronger the gravity

Question 2

How does the force of gravity affect objects on Earth and in our Solar System

Answer 2

It determines the weight of the objects

Question 3

What is motion

Answer 3

the change of position over time

Question 4

What happens when two unbalanced forces act on an object

Answer 4

The object will move with the force that is stronger

Question 5

What kinds of forces can act on an object

Answer 5

Contact forces

Question 6

What causes an object to speed up or slow down

Answer 6

an unbalanced force

Question 7

How can we describe the motion of an object

Answer 7

The motion of an object can only be described relative to the observer or to other objects

Question 8

What is friction

Answer 8

Friction is the contact force between two solids, liquids, or gases that slide past one another

Question 9

How does friction affect the motion of an object

Answer 9

causes it to slow down

Question 10

Air moves like a _____

Answer 10

Liquid

Question 11

Viscosity is the characteristic of a fluid that resists____

Answer 11

Flowing

Question 12

The average kinetic energy of the molecules and the substance refers to its _____.

Answer 12

Temperature

Question 13

Calories are units that express energy of _____.

Answer 13

Heat

Question 14

When molecules vibrate faster and faster, what happens to the substance?

Answer 14

It gets warmer

Question 15

How will the rising hot air balloon with colder around it rather than warm air.

Answer 15

It will rise with cold air around it faster

Question 16

What happens when an ice cube melts in a glass of water

Answer 16

The warm water around transfers to the ice.

Question 17

What is the boiling point of water in Fahrenheit

Answer 17

212℉

Question 18

Which statement is true about a large glass and a small glass of water with the same temperature

Answer 18

The large glass has more heat

Question 19

What temperature does water freeze celsius

Answer 19

0℃

Question 20

Which of the following is an example in which kinetic energy is converted into potential energy

Answer 20

Pulling a spring

Question 21

When on a roller coaster when you get to the top what change is taking place.

Answer 21

Kinetic to potential

Question 22

Friction converts energy to _____ energy.

Answer 22

Heat

Question 23

When you rub your hands together and they heat up because of ______.

Answer 23

Friction

Question 24

Friction is a ____.

Answer 24

Force

Question 25

Friction is caused by the _____ of objects, liquids, solids and gas.

Answer 25

Resistance

Question 26

Which type of friction acts on a parachute falling to the ground

Answer 26

Fluid

Question 27

Viscosity is the characteristic of a fluid that resists _____

Answer 27

Flowing

Question 28

The force that one surface exerts on another is called ______

Answer 28

Friction

Question 29

When an object rolls over a surface what type of force is acting on it?

Answer 29

Rolling friction

Question 30

What is the correct formula for weight

Answer 30

Mass x Gravity

Question 31

Gravity is the force that determines the _____ of matter

Answer 31

Weight

Question 32

Why do people weigh less on the moon

Answer 32

The moon has less gravitational pull

Question 33

The gravitational pull between two object depends oh how far there ____ is apart

Answer 33

Center of Mass

Question 34

are joules and N the same

Answer 34

yes

Question 35

What is kinetic energy?

Answer 35

Kinetic energy is the energy of moving things.

Question 36

What are some examples of kinetic energy?

Answer 36

a rolling ball, a swinging rope, a vibrating spring, small particles moving in matter

Question 37

What are some examples of kinetic energy being transformed into potential energy?

Answer 37

Roller Coasters

Question 38

What is the relationship between net force applied, mass, and change in motion of an object?

Answer 38

When a net force is applied to an object that has mass, the object will accelerate in the direction of the net force. If the forces acting on the object are balanced, there will be no acceleration.

Question 39

What is potential energy and what are some examples of it?

Answer 39

Potential energy is energy that is stored in an object

Question 40

If an object is moving in a constant speed and something pushed it, it would____.

Answer 40

Accelerate

Question 41

What are two types of potential energy?

Answer 41

gravitational potential energy, chemical potential energy

Question 42

What is the difference between potential energy and kinetic energy?

Answer 42

Potential energy is stored energy while kinetic energy is the energy of motion.

Question 43

How does potential energy turn into kinetic energy?

Answer 43

A book resting on a table has potential energy. If it is moved to the edge of the table, it will fall to the ground.