RETAKE Unit 3 Force and Motion

Obavezno

1

A. The forces are balanced so motion occurs.

B. The forces are balanced so no motion occurs.

C. The forces are unbalanced so motion occurs.

D. The forces are unbalanced so no motion occurs.

Obavezno

1

A train carrying coal is in motion on the train tracks. The diagrams below show different forces acting on the train as it accelerates. Which diagram shows forces acting on the train that would result in acceleration to the
left?

Obavezno

1

A. The crate moves forward at an increased speed.

B. The crate moves backward at an increased speed.

C. The crate moves forward at the same speed.

D. The crate moves backward at the same speed.

Obavezno

1

Obavezno

1

Action: The force of the foot on the ground Reaction: The force of the ground on the foot

Action: The force of the ground on the foot Reaction: The force of the foot on the ground

Action: The force of the ground on the skateboard Reaction: The force of the skateboard on the foot

Action: The force of the foot on the skateboard Reaction: The force of the skateboard on the ground

Obavezno

1

A. 0.25 m/s² to the west

B. 0.25 m/s² to the east

C. 4.0 m/s² to the west

D. 4.0 m/s² to the east

Obavezno

1

Airplane 1

Airplane 2

Airplane 3

Airplane 4

1

Inertia is _____.

a property of objects that describes their tendency to keep doing what they are already doing

a force that resists all movement

something that describes heavy objects but not light objects

a force that resists changes in motion

1

Someone throws you a baseball and you catch it with a baseball glove, exerting a force of 6 N in order to bring the ball to a stop. What do you know about the force the ball exerts on the glove?

it’s impossible to answer this without knowing the mass of the ball and the speed of the ball before impact

the ball exerts a force of 6 N on the glove. Newton’s third law tells us that the forces are equal and opposite

the force the ball exerts on the glove must be larger than the force the glove exerts on the ball since it’s the object moving

the force the ball exerts on the glove is smaller than the force the glove exerts on the ball because the ball stops

1

Friction between surfaces can be reduced by all of the following EXCEPT:

Smoothing the surfaces.

Using wheels or rollers.

Lubricating or rolling the surfaces.

Increasing the mass of the objects.

8.P.2A.5

RETAKE Unit 3 Force and Motion

A train carrying coal is in motion on the train tracks. The diagrams below show different forces acting on the train as it accelerates. Which diagram shows forces acting on the train that would result in acceleration to the
left?

Inertia is _____.

Someone throws you a baseball and you catch it with a baseball glove, exerting a force of 6 N in order to bring the ball to a stop. What do you know about the force the ball exerts on the glove?

Friction between surfaces can be reduced by all of the following EXCEPT:

A soccer ball comes to rest in the goal after being kicked.
Which statement correctly describes the forces acting on the soccer ball when it is at rest?

A train carrying coal is in motion on the train tracks. The diagrams below show different forces acting on the train as it accelerates. Which diagram shows forces acting on the train that would result in acceleration to the
left?

According to Newton’s first law, what happens to the crate just after the vehicle stops?

A student observes actions that occur during a football game and records them in the table below.
Which table correctly lists the law of motion demonstrated by each action?

A skateboarder pushes backward on the ground and skates forward for a few meters.
Which description best identifies an action-reaction pair that occurs?

An unbalanced force of 36 newtons is shown acting on a 9-kilogram object.
Based on this information, what is the acceleration of the object?

Four students designed and built toy airplanes that were launched into the air. The data are recorded in the table below.
Which toy airplane had the greatest acceleration?

Inertia is _____.

Someone throws you a baseball and you catch it with a baseball glove, exerting a force of 6 N in order to bring the ball to a stop. What do you know about the force the ball exerts on the glove?

Friction between surfaces can be reduced by all of the following EXCEPT:

RETAKE Unit 3 Force and Motion

RETAKE Unit 3 Force and Motion

A train carrying coal is in motion on the train tracks. The diagrams below show different forces acting on the train as it accelerates. Which diagram shows forces acting on the train that would result in acceleration to theleft?

Inertia is _____.

Someone throws you a baseball and you catch it with a baseball glove, exerting a force of 6 N in order to bring the ball to a stop. What do you know about the force the ball exerts on the glove?

Friction between surfaces can be reduced by all of the following EXCEPT:

A soccer ball comes to rest in the goal after being kicked. Which statement correctly describes the forces acting on the soccer ball when it is at rest?

A train carrying coal is in motion on the train tracks. The diagrams below show different forces acting on the train as it accelerates. Which diagram shows forces acting on the train that would result in acceleration to theleft?

According to Newton’s first law, what happens to the crate just after the vehicle stops?

A student observes actions that occur during a football game and records them in the table below.Which table correctly lists the law of motion demonstrated by each action?

A skateboarder pushes backward on the ground and skates forward for a few meters. Which description best identifies an action-reaction pair that occurs?

An unbalanced force of 36 newtons is shown acting on a 9-kilogram object.Based on this information, what is the acceleration of the object?

Four students designed and built toy airplanes that were launched into the air. The data are recorded in the table below. Which toy airplane had the greatest acceleration?

Inertia is _____.

Someone throws you a baseball and you catch it with a baseball glove, exerting a force of 6 N in order to bring the ball to a stop. What do you know about the force the ball exerts on the glove?

Friction between surfaces can be reduced by all of the following EXCEPT:

A train carrying coal is in motion on the train tracks. The diagrams below show different forces acting on the train as it accelerates. Which diagram shows forces acting on the train that would result in acceleration to the
left?

A soccer ball comes to rest in the goal after being kicked.
Which statement correctly describes the forces acting on the soccer ball when it is at rest?

A train carrying coal is in motion on the train tracks. The diagrams below show different forces acting on the train as it accelerates. Which diagram shows forces acting on the train that would result in acceleration to the
left?

A student observes actions that occur during a football game and records them in the table below.
Which table correctly lists the law of motion demonstrated by each action?

A skateboarder pushes backward on the ground and skates forward for a few meters.
Which description best identifies an action-reaction pair that occurs?

An unbalanced force of 36 newtons is shown acting on a 9-kilogram object.
Based on this information, what is the acceleration of the object?

Four students designed and built toy airplanes that were launched into the air. The data are recorded in the table below.
Which toy airplane had the greatest acceleration?