Table of Contents

- 1 What force causes projectiles to fall towards the ground?
- 2 What connection does Earth’s curvature have with the speed needed for a projectile to orbit Earth?
- 3 What causes objects to fall towards Earth?
- 4 What is projectile motion caused by?
- 5 What affects projectile motion?
- 6 What factors affect how far a projectile will land?
- 7 How often does a projectile fall around the Earth?
- 8 What is the speed of an orbiting projectile to avoid hitting the Earth?

## What force causes projectiles to fall towards the ground?

The force of gravity causes objects to fall toward the center of Earth. The acceleration of free-falling objects is therefore called the acceleration due to gravity.

## What connection does Earth’s curvature have with the speed needed for a projectile to orbit Earth?

How does Earth’s curvature relate to the speed needed for a projectile to orbit around Earth? An object falls about 5 m in the 1st second on free fall, the Earth curves downward 5 meters every 8000 meters so if the object is traveling 8000 m/s or 8 km/s it will never hit the earth.

**Does a projectile have to be in free fall?**

A projectile does not have to have horizontal motion. A projectile could begin its projectile motion with a downward velocity. A projectile does not need to be “falling.”

**Why doesnt the force of gravity change the speed of a satellite in circular orbit?**

The gravitational force doesn’t change the speed of a satellite in circular orbit because the force is always perpendicular to the direction of motion of the satellite. The force of gravity does no work on a satellite in circular orbit since the force is always perpendicular to the planet’s direction of motion.

### What causes objects to fall towards Earth?

The answer is gravity: an invisible force that pulls objects toward each other. Earth’s gravity is what keeps you on the ground and what makes things fall. Anything that has mass also has gravity.

### What is projectile motion caused by?

A projectile is any object that once projected or dropped continues in motion by its own inertia and is influenced only by the downward force of gravity. By definition, a projectile has a single force that acts upon it – the force of gravity.

**What connection does Earth’s curvature have with the speed needed for a projectile to orbit Earth quizlet?**

What connection does Earth’s curvature have with the speed needed for a projectile to orbit Earth? The speed has to be great enough that the distance the projectile falls each second matches the Earth’s curvature.

**How can a projectile become a satellite?**

A Satellite is a Projectile Once launched into orbit, the only force governing the motion of a satellite is the force of gravity. Newton was the first to theorize that a projectile launched with sufficient speed would actually orbit the earth.

#### What affects projectile motion?

FACTORS AFFECTING PROJECTILE MOTION There are three main factors that affect the trajectory of an object or body in flight: the projection angle, magnitude of projection velocity and height of projection.

#### What factors affect how far a projectile will land?

Factors affecting the flight path of a Projectile are:

- Gravity.
- Air Resistance.
- Speed of Release.
- Angle of Release.
- Height of Release.
- Spin.

**How can a projectile fall around the earth quizlet?**

A projectile can “fall around Earth” if the distance it falls matches the curvature of Earth.

**How does the moon fall without getting closer to us?**

So the moon “falls” toward Earth due to gravity, but doesn’t get any closer to Earth because its motion is an orbit, and the dynamics of the orbit are determined by the strength of gravity at that distance and by Newton’s laws of motion. Moon is continuously falling towards earth but missing all the time!

## How often does a projectile fall around the Earth?

In a circular orbit around a spherical planet, the force and the fall are always toward the center. The projectile falls 5 m for every 8 km and so does Earth. A projectile can “fall around Earth” if the distance it falls matches the curvature of Earth. All of the above.

## What is the speed of an orbiting projectile to avoid hitting the Earth?

To avoid hitting the Earth, an orbiting projectile must be launched with a horizontal speed of 8000 m/s. When launched at this speed, the projectile will fall towards the Earth with a trajectory which matches the curvature of the Earth.

**Is the motion of a satellite a projectile?**

Satellite Motion. First, an orbiting satellite is a projectile in the sense that the only force acting upon an orbiting satellite is the force of gravity. Most Earth-orbiting satellites are orbiting at a distance high above the Earth such that their motion is unaffected by forces of air resistance. Indeed, a satellite is a projectile.

**What is the launch angle of a projectile?**

A projectile is launched upward at an angle of 70° from the horizontal and strikes the ground a certain distance downrange. For what other angle of launch at the same speed would this projectile land just as far away?