S8P3B

S8P3b ~ Ross and Kenneth are playing tug-of-war. Ross is pulling on one end of a rope with a force of 230 N. Kenneth is pulling on the other end of the rope with a force of 300 N. Based on only the forces described, which statement describes the forces on the rope?

• The forces are balanced, so there is no net force on the rope.

• The forces are balanced, so there is a net force on the rope.

• The forces are unbalanced, so there is no net force on the rope.

• The forces are unbalanced, so there is a net force on the rope.

Tags

NGSS.MS-PS2-2

S8P3b ~ A calico cat is asleep in a box. Earth's gravity is pulling down on the cat with a force of 40 N. The bottom of the box is pushing up on the cat with a force of 40 N. Based on only the forces described, which statement describes the forces on the cat?

• The forces are balanced, so there is no net force on the cat.

• The forces are balanced, so there is a net force on the cat.

• The forces are unbalanced, so there is no net force on the cat.

• The forces are unbalanced, so there is a net force on the cat.

Tags

NGSS.HS-PS2-1

Malia is sliding a heavy dresser across the carpeted floor of her apartment. She is pushing the dresser forward with a force of 350 N. The carpet is pushing the dresser backward with a force of 380 N. Based on only the forces described, which statement describes the forces on the dresser?

• The forces are balanced, so there is no net force on the dresser.

• The forces are balanced, so there is a net force on the dresser.

• The forces are unbalanced, so there is no net force on the dresser.

• The forces are unbalanced, so there is a net force on the dresser.

Tags

NGSS.MS-PS2-2

S8P3b ~ An ice cube is floating in a glass of water. Earth's gravity is pulling down on the ice cube with a force of 0.1 N. The water is pushing up on the ice cube with a force of 0.1 N. Based on only the forces described, which statement describes the forces on the ice cubes?

• The forces are balanced, so there is no net force on the ice cubes.

• The forces are balanced, so there is a net force on the ice cubes.

• The forces are unbalanced, so there is no net force on the ice cubes.

• The forces are unbalanced, so there is a net force on the ice cubes.

Tags

NGSS.MS-PS2-2

What happens to the magnetic field around a wire when the electric current through the wire increases?

• It decreases

• It remains the same

• It increases

• It reverses direction

Tags

NGSS.MS-PS2-3

What is the term for the rate at which energy is transferred or converted?

• Power

• Energy

• Work

• Force

Tags

NGSS.HS-PS3-3

What is the principle of energy transfer in a battery-operated device?

• Mechanical to electrical

• Electrical to mechanical

• Chemical to electrical

• Electrical to chemical

Which of the following is a longitudinal wave?

• Light wave

• Sound wave

• Water wave

• Radio wave

S8P3b ~ Dakota is sitting on a porch swing while her young son sits in her lap. Earth's gravity is pulling down on Dakota with a force of 800 N. Dakota's son is pushing down on her with a force of 300 N. The swing is pushing up on Dakota with a force of 1100 N. Based on only the forces described, which statement describes the forces on Dakota?

• The forces are balanced, so there is no net force on Dakota.

• The forces are balanced, so there is a net force on Dakota.

• The forces are unbalanced, so there is no net force on Dakota.

• The forces are unbalanced, so there is a net force on Dakota.

Tags

NGSS.HS-PS2-1

S8P3b ~ Julie is walking her dog. A squirrel just ran by, and Scout is pulling forward on the leash with a force of 250 N. Julie is pulling backward on the leash with a force of 180 N. Based on only the forces described, which statement describes the forces on the leash?

• The forces are balanced, so there is no net force on the leash.

• The forces are balanced, so there is a net force on the leash.

• The forces are unbalanced, so there is no net force on the leash.

• The forces are unbalanced, so there is a net force on the leash.

Tags

NGSS.MS-PS2-2