Describe motion and force

Suppose a bulldozer is being hauled on the back of a flatbed truck at 50 km/h to a construction site. From which reference point would the bulldozer not appear to be moving?

• A. the road
• B. a traffic light
• C. the truck driver
• D. a roadside treen 1

Carmen is helping load furniture and boxes onto a moving truck. She picks up boxes of her things, places them on a cart, and pushes the cart to the moving van. Which term best describes the type of force Carmen is using?

• A. contact
• B. friction
• C. gravity
• D. noncontact

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground?

• A. A bird sat on a telephone wire.
• B. A woman moved her child from one place to another in a wagon.
• C. A man pulled weeds in his garden.
• D. A dog tugged on a rope held by a child.

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NGSS.5-PS2-1

Mr. Wang works in a recycling center. Recyclable materials arrive at the center mixed together. Workers use magnets to separate steel cans from other items. Which TWO statements are true about the force between a steel can and a magnet?

• A. Gravity pushes the can toward the magnet.
• B. The force between the can and the magnet is a noncontact force.
• C. The attraction between the can and the magnet is a pull.
• D. The attraction between the can and the magnet is a push.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Look at the Dog diagram above, where the large dog and the small dog tug on the rope. Which statement correctly explains the amount and direction of the net force acting on the rope, and in which direction the rope will move?

• A. The net force is 8 N to the left, and the rope will move to the right.
• B. The net force is 8 N to the left, and the rope will move to the left.
• C. The net force is 32 N to the left, and the rope will move to the left.
• D. The net force is 32 N to the right, and the rope will move to the right.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Carmen is helping load furniture and boxes onto a moving truck. She picks up boxes of her things, places them on a cart, and pushes the cart to the moving van. Which term best describes the type of force Carmen is using?

• A. contact

• B. friction

• C. gravity

• D. noncontact

Tags

NGSS.3-PS2-1

Look at the Dog diagram above, where the large dog and the small dog tug on the rope. Which statement correctly explains the amount and direction of the net force acting on the rope, and in which direction the rope will move?

• A. The net force is 8 N to the left, and the rope will move to the right.

• B. The net force is 8 N to the left, and the rope will move to the left.

• C. The net force is 32 N to the left, and the rope will move to the left.

• D. The net force is 32 N to the right, and the rope will move to the right.

Tags

NGSS.MS-PS2-2

Suppose a bulldozer is being hauled on the back of a flatbed truck at 50 km/h to a construction site. From which reference point would the bulldozer not appear to be moving?

• A. the road

• B. a traffic light

• C. the truck driver

• D. a roadside tree

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground?

• A. A bird sat on a telephone wire.

• B. A woman moved her child from one place to another in a wagon.

• C. A man pulled weeds in his garden.

• D. A dog tugged on a rope held by a child.

Tags

NGSS.MS-PS2-4