Space 1 Flashcards
Q. State the acceleration due to gravity.
A. 9.8 ms-2
Q. Explain why projectiles have a curved path
A. Projectiles have a constant horizontal velocity but accelerate vertically due to gravity. This gives them a curved path.
Q. State the equation used for horizontal projectile motion.
A. d = vt
Q. State the equation used for vertical projectile motion.
A. a = v - u
t
Q. State the initial vertical velocity (u) for projectiles.
A. 0 ms-1
Q. Explain how a satellite stays in orbit around the Earth.
A. A large horizontal velocity and Earth’s curved shape prevents gravity pulling the satellite back to the ground.
Q. State 3 types of man-made satellites and their uses.
A. Weather satellite for weather forecasting.
Spy satellite for gathering intelligence.
Communication satellite for transmitting information.
Q. State what is meant by a geo-stationary satellite.
A. A satellite which orbits above the same point of the Earth’s equator. It has an orbital time of 24 hours and orbits at an altitude of 36 000 km.
Q. State what a planet is.
A. A large mass orbiting the Sun in its own, unshared orbit.
Q. State what a dwarf planet is.
A. A large mass orbiting the Sun in a shared orbit.
Q. State what a moon is.
A. A large mass which orbits a planet.
Q. State what a star is.
A. A large ball of gas generating energy through nuclear fusion.
Q. State what the Sun is.
A. The star in our solar system.
Q. State what an asteroid is.
A. A small rock orbiting a star.
Q. State what a solar system is.
A. A collection of planets orbiting a star.
