Frictional force

Smooth surface has ……. friction.

• less

• more

• no

Rough surface has ……. friction.

• less

• more

• no

Look at the picture.

Which toy car will move faster?

• Toy car on smooth surface

• Toy car on rough surface

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Look at the picture.

Which toy car will move slower?

• Toy car on smooth surface

• Toy car on rough surface

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

Look at the picture.

Why did the toy car on smooth surface move faster?

• Because smooth surface has less friction

• Because smooth surface has more friction

Tags

NGSS.MS-PS3-1

Look at the picture.

Why did the toy car on rough surface move slower?

• Because rough surface has less friction

• Because rough surface has more friction

Tags

NGSS.MS-PS2-2

Observe the picture of a rough concrete floor carefully.

Describe the amount of friction on the rough concrete floor.

• The rough concrete floor has less friction.

• The rough concrete floor has more friction.

Tags

NGSS.MS-PS2-2

Observe the picture of a smooth ice skating rink carefully.

Describe the amount of friction on the smooth ice skating rink.

• The smooth ice skating rink has less friction.

• The smooth ice skating rink has more friction.

Observe the picture of a bumpy and furry carpet carefully.

Why will a toy car moves slowly on the bumpy and furry carpet?

• Because the bumpy and furry carpet has less friction.

• Because the bumpy and furry carpet has more friction.

Tags

NGSS.MS-PS2-2

Observe the picture of a smooth wooden flooring carefully.

Why will a coin moves faster on smooth wooden flooring?

• Because smooth wooden flooring has less friction.

• Because smooth wooden flooring has more friction.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5