What is a force?

• A form of motion

• A kind of friction

• A push or a pull

• A type of energy

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force on an object when all acting forces cancel each other out?

• It cannot be determined

• 0 Newtons

• 1 Newton

• 10 Newtons

Tags

NGSS.MS-PS2-2

What happens when forces are balanced?

• The object's mass increases

• The object moves in a circle

• There is no change in motion

• The object accelerates

Tags

NGSS.MS-PS2-2

Which type of friction opposes the motion of rolling objects?

• Rolling friction

• Fluid friction

• Sliding friction

• Static friction

What type of friction occurs between fluid layers?

• Sliding friction

• Static friction

• Fluid friction

• Rolling friction

What does the law of universal gravitation state?

• Gravity is weakest at the center of the Earth

• Gravity only affects planets and stars

• All objects in the universe attract each other

• Gravity is stronger on Earth than in space

Tags

NGSS.MS-PS2-4

What factor does gravitational force not depend on?

• Volume of the objects

• Mass of the objects

• Distance between the objects

• Color of the objects

Tags

NGSS.MS-PS2-4

What is the acceleration due to gravity on Earth?

• 9.8 m/s^2

• 10 m/s^2

• 9.8 m/s

• 9.8 km/h^2

What is terminal velocity?

• The constant velocity reached when gravity and air resistance balance

• The velocity at which an object starts to fall

• The highest velocity an object can reach

• The velocity just before an object hits the ground

What is the unit of force?

• Newton

• Joule

• Meter per second

• Kilogram

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4