U7L2 Motion and friction

Friction can slow down an object in motion.

• True
• False

Tags

NGSS.MS-PS3-5

An object at rest has unbalanced forces acting on it.

• True
• False

Tags

NGSS.MS-PS2-2

Forces can change the speed and direction of an object in motion.

• True
• False

Tags

NGSS.MS-PS2-2

Forces that cancel each other out are balanced.

• True
• False

Gravity is a force that acts on all objects on Earth.

• True
• False

Tags

NGSS.5-PS2-1

An object that is increasing its speed is _____________.

• a. accelerating
• b. slowing down
• c. at rest
• d. being acted on by balance forces

Tags

NGSS.MS-PS2-2

Which of the following is not a force?

• a. a push
• b. a pull
• c. gravity
• d. distance

An object that collides with another object is delivering a __________________.

• a. noncontact force
• b. contact force
• c. balanced force
• d. light force

Tags

NGSS.MS-PS2-1

Which of the following does not cause acceleration?

• a. unbalanced forces
• b. gravity
• c. a pushing force
• d. balanced forces

How do gravity and friction relate to a ball rolling on a carpet?

• a. the do not relate to the ball moving
• b. gravity causes the ball to slow down and friction causes it the move
• c. gravity causes the ball to move and friction slows it down
• d. friction and gravity both cause the ball to speed up

Tags

NGSS.MS-PS2-4