5th Grade PS.5.2.1

What is friction?

• A force that accelerates the motion of an object.

• A force that opposes the motion of an object when it comes into contact with another surface.

• A type of energy that is lost during motion.

• A force that increases the speed of an object.

How does mass affect the speed of a rolling ball?

• Increasing the mass of the ball generally makes it harder to accelerate, affecting its speed.

• Mass has no effect on the speed of a rolling ball.

• A heavier ball will always roll faster than a lighter ball.

• The speed of a rolling ball increases with mass due to greater momentum.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

How can you investigate the effect of mass on speed?

• By changing the mass of the ball in an experiment while keeping other factors constant.

• By measuring the speed of the ball at different heights.

• By using a heavier ball to see if it rolls faster on a flat surface.

• By increasing the temperature of the ball before the experiment.

Tags

NGSS.MS-PS2-2

What is the difference between contact and non-contact forces?

• Contact forces act at a distance, while non-contact forces require physical contact between objects.

• Contact forces require physical contact between objects, while non-contact forces act at a distance, like gravity.

• Contact forces are stronger than non-contact forces in all situations.

• Non-contact forces can only be observed in space.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is an example of gravity as a non-contact force?

• A ball falling from a height demonstrates gravity as a non-contact force.

• A person pushing a car demonstrates gravity as a non-contact force.

• A magnet attracting a paperclip demonstrates gravity as a non-contact force.

• A balloon rising in the air demonstrates gravity as a non-contact force.

Tags

NGSS.MS-PS2-5

What is an example of a contact force?

• A book sliding across a table

• The gravitational pull of the Earth

• A magnet attracting a paperclip

• The friction between two surfaces in space

What is the role of friction on different surfaces?

• Friction is the same on all surfaces, allowing objects to move at the same speed.

• Friction varies on different surfaces; for example, a toy car moves slower on a carpet than on a smooth wooden floor due to higher friction on the carpet.

• Friction only affects objects that are stationary, not moving ones.

• Friction is only present on rough surfaces and has no effect on smooth surfaces.

How does increasing friction affect the motion of a moving object?

• It causes the object to speed up.

• It has no effect on the object's motion.

• Increasing friction causes the object to slow down.

• It changes the direction of the object's motion.

Tags

NGSS.MS-PS2-2

Why do objects roll differently on various surfaces?

• Because of the varying levels of friction present.

• Due to the weight of the objects.

• Because of the color of the surfaces.

• Due to the shape of the objects.

Tags

NGSS.MS-PS2-2

What happens to a soccer ball when it rolls across grass?

• The soccer ball speeds up due to the smooth surface of the grass.

• The soccer ball slows down due to the friction between the ball and the grass.

• The soccer ball bounces higher because of the grass.

• The soccer ball rolls at a constant speed without any change.

Tags

NGSS.MS-PS2-2