Motion, Force and Models

John and his son are applying forces to move a box, as shown.

What are the magnitude and direction of the net force?

• 3 N towards the east

• 3 N towards the west

• 9 N towards the east

• 9 N towards the west

Tags

NGSS.MS-PS2-2

A student applies forces to a cart. Which model accurately shows a cart that will remain stationary?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

What relationship exists between mass and inertia?

• As mass increases, inertia decreases.

• As mass increases, inertia increases.

• Mass cancels the property of inertia.

• Mass cancels the property of inertia.

Tags

NGSS.HS-PS2-1

The image shows two identical wheelbarrows. One is loaded with bricks, and the other is empty.

Samantha pushes each wheelbarrow with the same force. Which wheelbarrow will be most difficult to push?

• Wheelbarrow 2 since it has less mass and, therefore, less inertia

• Wheelbarrow 2 since it has less mass and, therefore, more inertia

• Wheelbarrow 1 since it has more mass and, therefore, less inertia

• Wheelbarrow 1 since it has more mass and, therefore, more inertia

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student performs an investigation by following a procedure, as shown.

The student observes that the card quickly moves out from under the coin, and the coin falls into the cup rather than moving along with the card, as shown.

Which statement explains the observation?

• Inertia causes an object to fall to the ground.

• An object at rest has the tendency to remain at rest.

• Inertia causes an object to change its speed and direction.

• An object maintains its position regardless of the force applied to it.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.MS-PS3-4

The force that acts in the opposite direction of motion when two surfaces come in contact. 

• Force
• Friction
• Static
• Kinetic 

What direction does friction act relative to motion?

• in the same direction
• in the opposite direction 
• need more information
• depends on the force

 What is the force of friction between a block of ice that weighs 950 N and the ground if μ = .12? 

• 65 N
• 226 N
• 175 N
• 114 N

What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 

• 0.78
• 0.51
• 0.78 N
• 0.58 N

Tags

NGSS.MS-PS2-2