Forces...Lesson 19-2

Force is _________________________.

• push and pull

• bounce and drop

• throw and catch

• walk and run

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A contact force that resists the sliding motion between two objects is __________________________.

• contact force

• mass

• non-contact force

• friction

Two examples of contact forces are __________________.

• a cat sleeping and the wind blowing

• running and a bird flying

• kicking a ball and pushing the pedal on a bike

• a leaf falling through the air and a person skating

Tags

NGSS.3-PS2-1

______________ surfaces produce greater friction.

• bigger

• smoother

• higher

• rougher

Which one has more friction?

• driving on gravel

• driving on pavement

______________ is the amount of gravity acting on an object.

• weight

• shape

• force

• size

Tags

NGSS.5-PS2-1

A force that pushes or pulls an object without touching it is _____________________.

• non-contact force

• unbalanced force

• balanced force

• contact force

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-4

NGSS.MS-PS2-5

The sum of all forces acting on an object is ______________________.

• force net

• the force

• mass

• net force

Tags

NGSS.MS-PS2-2

Who discovered gravity?

• Sir Walter Henry

• Sir Winston Churchill III

• Sir Isaac Newton

• Sir Louis Pasteur

Tags

NGSS.HS-PS2-4

Which one has more friction?

• running on grass

• running on pavement