A. Height of a Projectile
A projectile is fired straight up from the south pole of earth with an initial speed of 8.0km/s. Find the maximum height it reaches, neglecting effects due to air resistance.

b. Speed of a Projectile.
A projectile is fired straight up from the south pole of earth with an initial speed of 15.0km/s. Find speed of the projectile when it is very far from the Earth neglecting effect due air height it reaches, neglecting effects due to air resistance.

c. Gravitational field of two point particles
Two point particles, each of mass M, are fixed in the position on y axis at y = +a and y =-a. Find the gravitational field must include at all on the axis as a function of x.

d. A small block with mass 0.300kg is attached to a string passing through a hole in a frictionless, horizontal surface. The block is originally revolving in a circle with a radius of 0.790m about the hole with a tangential speed of 4.50m/s . The string is then pulled slowly from below, shortening the radius of the circle in which the block revolves. The breaking strength of the string is 33.0N.

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... to calculate the changes in potential energy as definite ... Imagine that a conservative force field is defined in a ... Well, think of a gravitational field (the one ...

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... a mass m in a uniform gravitational field g, so ... result to prove that the force of gravity is ... y measured vertically up, the gravitational potential energy is U ...

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... The potential energy corresponding to attractive force field is always negative like gravitational potential energy, while potential energy corresponding to ...

... To escape from the Earth's gravitational field the object ...energy than its gravitational binding energy. The gravitational potential energy between an object of ...