Two projectiles are fired at the same initial speed on level ground. Prove that that if one projectile was launched at an angle of w.r.t. the ground and the other at an angle such that ( + ) = 90o that they have the same range. For the case when = 60o and = 30o, which projectile takes the longest time to hit the ground? Sketch for the two projectiles (a) the trajectory and (b) the vertical displacement against time. P5697 A rocket takes off from the launch pad with constant thrust. Which choice shows how the acceleration and velocity changes as it rises? Explain your answer. Given the radius of the Earth is 6400 km, a rocket places a satellite into a stable orbit of altitude 4020 km. Calculate the period of the satellite, P5777 A space probe P is in a stable orbit around small, distant planet. Sketch the orbit of the space probe. The probe fires a forward-facing rocket that reduces its orbital speed by half. Sketch the subsequent motion of the planet. (HSC 2005). A missile travelling at 90% of the speed of light has a rest length of 10 m. Calculate the length of the moving missile as measured by a stationary observer directly under the flight path of the missile. P5854 (a) Give two reasons to explain why the concept of is useful. g-force (b) Explain why the space shuttle is apparently while in orbit. “weightless” Two astronauts landed on a very small asteroid orbiting the Sun between Mars and Jupiter. They experienced almost negligible weight force. Explain. P5876 Calculate the escape velocity from the Earth’s surface (m.s-1 and km.h-1). Earth’s mass = 5.971024 kg Earth’s radius = 6.38106 m ME RE universal gravitation constant = 6.67310-11 N.m2.kg-2 G The idea of a universal aether was first proposed to explain the transmission of light through space. Michelson and Morley attempted to measure the speed of Earth through the aether. Evaluate the impact of the result of the Michelson and Morley experiment on scientific thinking. P5891 In 1970 NASA launched Apollo 13, their third mission planned to land humans on the Moon. Half-way to the Moon a huge explosion crippled the spacecraft. The only way
Two projectiles are fired at the same initial speed on level ground. Prove that that if one projectile was launched at an angle of w.r.t. the ground and the other at an angle such that ( + ) = 90o that they have the same range. For the case when = 60o and = 30o, which projectile takes the longest time to hit the ground? Sketch for the two projectiles (a) the trajectory and (b) the vertical displacement against time. P5697 A rocket takes off from the launch pad with constant thrust. Which choice shows how the acceleration and velocity changes as it rises? Explain your answer. Given the radius of the Earth is 6400 km, a rocket places a satellite into a stable orbit of altitude 4020 km. Calculate the period of the satellite, P5777 A space probe P is in a stable orbit around small, distant planet. Sketch the orbit of the space probe. The probe fires a forward-facing rocket that reduces its orbital speed by half. Sketch the subsequent motion of the planet. (HSC 2005). A missile travelling at 90% of the speed of light has a rest length of 10 m. Calculate the length of the moving missile as measured by a stationary observer directly under the flight path of the missile. P5854 (a) Give two reasons to explain why the concept of g-force is useful. (b) Explain why the space shuttle is apparently “weightless” while in orbit. Two astronauts landed on a very small asteroid orbiting the Sun between Mars and Jupiter. They experienced almost negligible weight force. Explain. P5876 Calculate the escape velocity from the Earth’s surface (m.s-1 and km.h-1). Earth’s mass ME = 5.971024 kg Earth’s radius RE = 6.38106 m universal gravitation constant G = 6.67310-11 N.m2.kg-2 The idea of a universal aether was first proposed to explain the transmission of light through space. Michelson and Morley attempted to measure the speed of Earth through the aether. Evaluate the impact of the result of the Michelson and Morley experiment on scientific thinking. P5891 In 1970 NASA launched Apollo 13, their third mission planned to land humans on the Moon. Half-way to the Moon a huge explosion crippled the spacecraft. The only way
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