Question

A projectile is shot straight up from the earth's surface at a speed of 7000 km/hr. How high does it go?

Answer #1

A projectile is shot directly away from Earth's surface. Neglect
the rotation of the Earth. What multiple of Earth's radius RE gives
the radial distance (from the Earth's center) the projectile
reaches if (a) its initial speed is 0.480 of the escape speed from
Earth and (b) its initial kinetic energy is 0.480 of the kinetic
energy required to escape Earth? (Give your answers as unitless
numbers.) (c) What is the least initial mechanical energy required
at launch if the...

A space probe is fired as a projectile from the Earth's surface
with an initial speed of 2.12*10^4 m/s. What will its speed be when
it is very far from the Earth in m/s? Ignore atmospheric friction
and the rotation of the Earth.

A rocket is launched vertically upward from Earth's surface at a
speed of 5.0 km/s .
What is its maximum altitude? in meters using two significant
figures

A projectile is shot from the edge of a cliff 100 m above ground
with an initial speed of 50.0 m/s at an angle of 26° below the
horizontal. How much time does it take the projectile to hit the
ground?

Two meteoroids are 2.0×105 km from Earth's center and
heading straight toward Earth. One is moving at 12 km/s , the other
at 20 km/s . a. At what speed will the first meteoride strike the
Earth? b. At what speed will the second meteoride strike the
Earth?

A 160 kg satellite is orbiting on a circular orbit 7655 km above
the Earth's surface. Determine the speed of the satellite. (The
mass of the Earth is 5.97×1024
kg, and the radius of the Earth is 6370 km.)
(in km/s)

A projectile is launched vertically from the surface of the Moon
with an initial speed of 1360 m/s. At what altitude is the
projectile's speed two-thirds its initial value?

A projectile is launched vertically from the surface of the Moon
with an initial speed of 1100 m/s. At what altitude is the
projectile's speed one-fourth its initial value?

A muon is created 65 km above the surface of the earth. In the
earth's frame, the muon is traveling directly downward at
0.9999c.
Part A In the earth's frame of reference, how much time elapses
between the muon's creation and the time it reaches the
surface?
Part B
Use time dilation to determine, in the muon's frame, how much
time elapses between the muon's creation and the time it reaches
the surface.
Part C
In the muon's frame of...

A satellite is in Earth's orbit, altitude of 2.5rE from Earth's
surface. How long does it take for the satellite to orbit once
around the Earth in seconds?

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