Thursday

October 23, 2014

October 23, 2014

Posted by **Jessy** on Sunday, January 14, 2007 at 9:46pm.

(a) As a multiple of Earth's radius RE, what is the radial distance a projectile reaches if its initial speed is one-fifth of the escape speed from Earth?

____ times RE

(b) As a multiple of Earth's radius RE, what is the radial distance a projectile reaches if its initial kinetic energy is one-fourth of the kinetic energy required to escape Earth?

_____ timesRE

(c) What is the least initial mechanical energy required at launch if the projectile is to escape Earth?

P.S.Bobpursley, sorry,I don't really understand the last question you answered....

**Answer this Question**

**Related Questions**

Physics Question......many thanks - A projectile is shot directly away from ...

Physics - Calculate the percentage of Earth’s gravitational force on the ISS ...

physics - The earth has a radius of 6380 km and turns around once on its axis in...

Physics - Neglect the gravity of the Moon, neglect atmospheric friction, and ...

Physics - When we say that the weight of an object is Mg, and that g = 9.8 N/kg...

Physics - When we say that the weight of an object is Mg, and that g = 9.8 N/kg...

Physics HELLLPPPP - When we say that the weight of an object is Mg, and that g...

PHYSICS(HELP!!) - A hole is drilled with smooth sides straight through the ...

physics help (elena) - A hole is drilled with smooth sides straight through the ...

physics (PLS HELP) - A hole is drilled with smooth sides straight through the ...