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# Ignoring air resistance what is the minimum initial speed a projectile must have at the Earths surface if the projectile is to escape the Earths gravitational pull?

Updated: 9/14/2023

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14y ago

8km/s

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14y ago

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Q: Ignoring air resistance what is the minimum initial speed a projectile must have at the Earths surface if the projectile is to escape the Earths gravitational pull?
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### What makes up a projectile motion?

Some of the factors that determine the movements of a projectile include: air resistance, force of gravity, initial launch velocity, the angle a projectile was launched at, and the objects initial elevation.

### What is the horizontal displacement of a projectile?

it depends on the gravitational force of attraction of earth and air resistance. if we are neglecting air resistance, the max.horizontal distance is according to this formulae, V0/2 * sin (2theta) where V0 is the initial velocity theta is the angle with x axis and the projection.

### What do need to know to determine how far projectile travels horizontally?

angle of projection,initial velocity and gravitational acceleration

### Why projectile angle increase when projectile range also increase?

Range of a projectileThe path of this projectile launched from a height y0 has a range d.In physics, a projectile launched with specific initial conditions in a uniform gravity field will have a predictable range. As in Trajectory of a projectile, we will use:g: the gravitational acceleration-usually taken to be 9.80 m/s2 (32 f/s2) near the Earth's surface&Icirc;&cedil;: the angle at which the projectile is launchedv: the velocity at which the projectile is launchedy0: the initial height of the projectiled: the total horizontal distance travelled by the projectileWhen neglecting air resistance, the range of a projectile will beIf (y0) is taken to be zero, meaning the object is being launched on flat ground, the range of the projectile will then simplify toso to increase the range &Icirc;&cedil; shoud vary from 0 to 45 and after 45 it starts decreasing.

### How does projectile differ from an object in free fall?

A projectile has an initial forward velocity.

### How does a projectile differ from an object free fall?

A projectile has an initial forward velocity.

### If you throw an object with initial velocity Vo at angle theta what is the Vx and Vy components at the highest point ignoring any friction except the gravitational force?

At the highest point, Vx = Vocos&Iuml;&acute;and Vy = 0.This is assuming that &Iuml;&acute; is the angle made by Vo with the horizontal.(check the related links for more info on projectile motion)

### How Does Projectile differ from a object in free fall?

The initial velocty of a projectile is non-zero.

### Some strange facts about central force?

A projectile of mass m is fired from the surface of earth at an angle a from vertical. The initial speed v is equal to (GMe/Re)^0.5. How high does the projectile rise? Neglect air resistance and the earth's rotation.

### What launch angle makes the ball go farther?

yes it does because you can get the maximum distance from a 45 degree angle - at an elevation of 0, but as your beginning height (above the surface) increases the angle for maximum range changes.

### What is the shape of projectile?

Any shape you like. A stone that is thrown is a projectile. A cannonball, arrow, spear, bullet are all projectiles. A projectile s an object all of whose momentum comes at the moment of launch; once it is launched, it travels under that initial momentum and external forces such as gravity and air resistance. There is no "on board" rocket or other means of propulsion.

### What affects the vertical component of a projectile's velocity?

The effect that gravity has on the vertical component of the projectile is that as the projectile is going upward it is decreasing 10m/s ever second it is going upward until it reaches its peak. at its peak its vertical component is zero. Then as it is going back to earth it is increasing at 10 m/s every second that is it going downward. for example, a boy throws a ball at 20 m/s upward its velocity after 2 seconds will be zero due to the fact that gravity canceled out the force and then.. what is the velocity after 4 seconds? it is 20 m/s.. gravity added 10 m/s ever second that it was falling to the earth. hope this helps