PHSC 101 - EM Activity 2: Motion and Energy

In an ice-hockey game, the kinetic energy of the puck can change due to its (a)  

• The color of the puck

• The speed of the puck

• The temperature of the puck

• The shape of the puck

Answer explanation

The kinetic energy of the puck is directly related to its speed. As the speed of the puck increases, its kinetic energy increases, making this the correct choice. The other options do not affect kinetic energy.

Tags

NGSS.HS-PS3-2

What is the kinetic energy of an object dependent on?

• Mass and speed

• Color and shape

• Temperature and pressure

• Volume and density

Answer explanation

The kinetic energy of an object is dependent on its mass and speed, as described by the formula KE = 1/2 mv². This means that both the amount of matter (mass) and how fast it is moving (speed) directly affect its kinetic energy.

Tags

NGSS.MS-PS3-1

What is the name given to the cart that is not pushed?

• Launched cart

• Target cart

• Magnetic cart

• Frictionless cart

Answer explanation

The cart that is not pushed is referred to as the 'Target cart'. This term is used in physics to describe a cart that remains stationary while another cart is launched towards it.

What is evidence for a change in kinetic energy?

• Change in color

• Change in speed

• Change in temperature

• Change in shape

Answer explanation

Change in speed is direct evidence of a change in kinetic energy, as kinetic energy depends on the velocity of an object. Other options like color, temperature, and shape do not directly indicate changes in kinetic energy.

Tags

NGSS.HS-PS3-2

What is the term used to describe energy stored in chemicals in our bodies?

• Kinetic energy

• Thermal energy

• Chemical potential energy

• Mechanical energy

Answer explanation

The term 'Chemical potential energy' refers to the energy stored in the bonds of chemical compounds in our bodies. This energy is released during chemical reactions, making it essential for biological processes.

Tags

NGSS.HS-LS2-5

What is the significance of the term 'chemical' in chemical potential energy?

• It refers to energy stored in physical objects

• It refers to energy stored in chemicals in our bodies

• It refers to energy stored in machines

• It refers to energy stored in the environment

Answer explanation

The term 'chemical' in chemical potential energy specifically refers to the energy stored in the bonds of chemicals, particularly in our bodies, which is crucial for biological processes and energy transfer.

Tags

NGSS.HS-PS1-4

Match the following roles with their descriptions in the contact push/pull interaction.

• Role that takes in energy during the interaction

• Energy giver

• Role that provides energy during the interaction

• Conversation of Energy

• Energy cannot be created or destroyed

• Energy receiver

Tags

NGSS.MS-PS3-5

What is the main focus of Activity 2 in the document?

• Motion and Energy

• Chemical Reactions

• Biological Processes

• Historical Events

Answer explanation

Activity 2 primarily focuses on Motion and Energy, exploring concepts related to how objects move and the energy involved in these processes, distinguishing it from other topics like Chemical Reactions or Biological Processes.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

What does the decrease in energy of the giver equal to, according to the conservation of energy?

• A) Increase in energy of the receiver

• B) Decrease in energy of the receiver

• C) Increase in mass of the receiver

• D) Decrease in mass of the receiver

Answer explanation

According to the conservation of energy, the energy lost by the giver must equal the energy gained by the receiver. Therefore, the decrease in energy of the giver equals the increase in energy of the receiver, making A the correct choice.

Tags

NGSS.HS-PS3-4

A soccer player uses his or her ability to kick a soccer stationary ball. Complete the G/R energy diagram for what happened during the interaction.

Tags

NGSS.HS-PS2-1