# HS-PS2-1

## Analyze data to support the claim that Newton's second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.

Physics

### Explainer: The fundamental forces

Four fundamental forces control all interactions between matter, from the smallest subatomic particles to the largest structures in the universe.

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Physics

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Physics

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## More Stories in HS-PS2-1

1. Physics

### Analyze This: Masks cut the distance that spit droplets fly

Both cloth masks and surgical masks reduced the distance spit traveled from a person talking or coughing by at least half, compared with no mask.

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2. Physics

### Explainer: Gravity and microgravity

The force of gravity holds us on the ground, keeps planets in orbit and extends throughout space. A very weak gravitational pull is called microgravity.

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3. Physics

### Scientists Say: Mass

Mass shows how much an object resists speeding up or slowing down when force is applied — a measure of how much matter is in it.

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4. Physics

### Staying grounded in space requires artificial gravity

On TV, people in space walk around like they’re on Earth. How can science give real astronauts artificial gravity? Spin right round, baby.

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5. Physics

### Light levitation might help explore Earth’s ‘ignorosphere’

A toy called a light mill inspired researchers to invent a new way to fly. They’re using light to levitate small nanotube-coated discs.

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6. Physics

### Scientists Say: Acceleration

Acceleration is a change in velocity. That could mean a change in speed or in direction.

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7. Physics

### Researchers reveal the secret to the perfect football throw

The tip of a spiraling football follows the ball’s path. If you know a thing or two about gyroscopes, this is not what you’d expect.

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8. Physics

### Scientists Say: Velocity

Velocity is more than speed. It is both speed and the direction in which an object is traveling.

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9. Physics

### How physics lets a toy boat float upside down

Buoyancy’s upward force keeps objects afloat even in unusual conditions.

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