STAAR

Forces that have a net force of zero 

• Balanced force

• Unbalanced force

The sum of all forces acting on an object.

• Contact Force

• Balanced Force

• Unbalanced Force

• Net Force

Tags

NGSS.MS-PS2-2

What will cause an object to move?

• Applied forces

• Balanced forces

• Unbalanced forces

Tags

NGSS.MS-PS2-2

the mother moves forward, and the daughter moves backward with a greater acceleration

• the mother moves forward, and the daughter moves backward with a greater acceleration

• both move forward, but the mother moves with greater acceleration

• the mother moves backward, and the daughter moves forward with a greater acceleration

• both move backward, but the daughter moves with a greater acceleration

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The diagrams show forces acting on a toy car as it moves to the right. Which diagram shows the toy car that will most likely accelerate to the right based on these conditions?

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Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A pitcher throws a ball toward a player holding a softball bat. The player uses the bat to hit the ball. The bat applies a 10 newton force to the ball. Which statement correctly describes the reaction force between the bat and the ball?

• the reaction force is the force that causes the ball to move toward the bat

• the reaction force is the force applied to the bat by the player holding the bat

• the reaction force is the force that pulls the ball toward the ground

• the reaction force is the force of the ball on the bat

Tags

NGSS.MS-PS2-1

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• moving at a constant speed

• accelerating

• moving toward the north

• stopped

Tags

NGSS.MS-PS3-1

Samuel kicks a soccer ball across a grassy field and it eventually comes to a stop. If Newton’s law of inertia is true, why did the ball stop? 

• Newton’s law only applies to objects at rest. 

• The mass of the ball is not great enough to have inertia. 

• Friction with the grass applies a net force on the ball causing it to decrease its speed. 

• Gravity slowed the ball until it came to a stop. 

A ball at the top of a hill has ________ ________ because if pushed it will roll down the hill.

• Mechanical Force

• Unbalanced Energy

• Potential Energy

• Unbalanced Force

Tags

NGSS.MS-PS3-2