Science 7 Physics Review

Which of Newton's Laws of Motion states that an object will stay at rest or in uniform motion in a straight line unless acted upon by an unbalanced force?

• First Law

• Second Law

• Third Law

• Fourth Law

What is the difference between speed and velocity?

• Speed is a vector quantity, while velocity is not.

• Speed is scalar and does not include direction, while velocity is a vector and includes direction.

• There is no difference; they are the same.

• Velocity is always faster than speed.

What does the principle of conservation of energy state?

• Energy can be created but not destroyed.

• Energy can neither be created nor destroyed, only transformed from one form to another.

• Energy can be destroyed but not created.

• Energy can be transformed but not conserved.

Tags

NGSS.MS-PS3-5

What is acceleration?

• The rate at which velocity changes over time.

• The distance covered per unit time.

• The rate at which speed decreases.

• A measure of how fast an object is moving.

Tags

NGSS.MS-PS2-2

According to Newton's Third Law of Motion, what happens when one body exerts a force on a second body?

• The second body does not exert a force in response.

• The second body exerts an equal and opposite force on the first body.

• The first body increases its force automatically.

• The second body moves in the direction of the force without exerting any force.

Tags

NGSS.MS-PS2-1

What is the standard unit of force?

• Joule

• Newton

• Watt

• Meter per second squared

Which of the following is an example of a lever?

• Ramp

• Screw

• Seesaw

• Wheelbarrow

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Kinetic energy depends on

• mass and height

• height and speed

• mass and speed

• mass and force

Tags

NGSS.MS-PS3-1

What kind of energy is in a rock at the edge of a cliff?

• Potential
• Kinetic

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2