Exam 10: Projectile and Satellite Motion

Consider a monkey wrench released at rest at the far edge of the solar system.Suppose that it drops to the Earth by virtue of only Earth gravity.It will strike the Earth's surface with a speed of about

An Earth satellite is simply a projectile

It takes Pluto a longer time to orbit the sun than the Earth does because Pluto

An object is dropped and freely falls to the ground with an acceleration of 1 g.If it is thrown upward at an angle instead,its acceleration will be

If a satellite's radial velocity is zero at all times,its orbit must be

A vertically oriented rocket that is somehow able to maintain a continuous upward velocity of 8 km/s will

Which would require the greater energy;slowing down of the orbital speed of the Earth so it crashes into the sun,or speeding up the orbital speed of the Earth so it escapes the sun?

A rocket coasts in an elliptical orbit about the Earth.To attain escape velocity using the least amount of fuel in a brief firing time,should it fire off at the apogee,or at the perigee? (Hint: Let "Fd = change in KE" guide your thinking. )

A "weightless" astronaut in an orbiting shuttle is

Acceleration due to gravity on the moon is less than on Earth,and the moon is smaller than Earth.So compared to an Earth satellite,a satellite in close orbit about the moon would travel

A bullet fired horizontally over level ground hits the ground in 0.5 second.If it had been fired with twice the speed in the same direction,it would have hit the ground in

Use the following figure to answer the question : -A rock is thrown upward at 50 degrees with respect to the horizontal.As it rises,neglecting air drag,its horizontal component of velocity

A satellite near the Earth makes a full circle in about an hour and a half.How long would a satellite located as far away as the moon take to orbit the Earth?

The ground speed of an airplane that has an airspeed of 200 km/h when it is in a 200-km/h crosswind is

A river 100 m wide flows due south.A boat that goes 1 m/s relative to the water is pointed due east as it crosses from the west bank.The boat crosses in

A projectile is launched vertically upward at 50 m/s.If air resistance is negligible,its speed upon returning to its starting point is

Two projectiles are fired from ground level at equal speeds but different angles.One is fired at an angle of 30 degrees and the other at 60 degrees.The projectile to hit the ground first will be the one fired at (neglect air resistance)

A projectile is launched at ground level an angle of 15 degrees above the horizontal and lands down range.What other projection angle for the same speed would produce the same down-range distance?

A bullet fired horizontally from a rifle begins to fall

Minimal orbital speed about the Earth is about 8 km/s.Minimal orbital speed about the moon would be