Anstrnomy questions

The speed an object needs to move away from the gravitational pull of the Earth is called

·         Orbital velocity

·         Escape velocity

·         Rotational velocity

·         Random velocity

Which statement is true about Newton's first law of motion?

·         A body at rest stays at rest unless a force is applied to it

·         A body in motion stays in motion unless a force is applied to it

·         A body in motion has the tendency to come to a stop eventually

·         Both A and C

·         Both A and B

If you are lucky enough to get a chance to visit different planets of our Solar System, which of the following statements will be true?

·         Your weight will change, but your mass will remain the same

·         Your mass will change, but your weight will remain the same

·         Both your weight and mass will remain the same

·         Both your weight and mass will change

The recoil experienced when firing a shotgun is a consequence of _____ law.

·         Newton's 1st

·         Kepler's 3rd

·         Newton's 3rd

·         Newton's 2nd

·         Keplers 1st

An astronaut feels weightlessness in space. The astronaut's mass in space is ______.

·         Zero

·         The same as on the Earth

·         Double than on the Earth

·         Becoming lesser and lesser as s/he is going higher

·         Proportional to acceleration

Consider an apple falling off a tree. Which of the following apply to this situation?

·         The apple is attracting the Earth

·         The Earth is attracting the apple

·         The Earth is attracting the apple; the apple is not attracting the Earth

·         Only B and C apply

·         Only A and B apply

Due to what property does a body display the tendency to stay in the state of rest or motion?

·         Temperature

·         Acceleration

·         Pressure

·         Inertia

·         Volume

Suppose that the Sun started shrinking in size, without losing any mass. What would be the effect of the Sun's change on the orbits of the planets?

·         The orbits would become smaller in size

·         The orbits would become larger

·         The orbits would not be affected

·         The planets would escape

·         A black hole would form engulfing our planet

According to Newton's second law, if the net force acting on an object doubles, then the _____ doubles as well.

·         Mass

·         Acceleration

·         Speed

·         Velocity

·         Inertia

If the forces that you and your friend are exerting on an object are balanced, then the object

·         Will not move

·         Will move with a constant velocity

·         Will move but not accelerate

·         None of the above

If the forces that you and your friend are exerting on an object are balanced, then the object

·         Will not move

·         Will move with a constant velocity

·         Will move but not accelerate

·         None of the above