PPT-7.3 Gravity — a non-contact force

On the Giant Drop on the Gold Coast passengers fall 120 metres 39 storeys in 5 seconds reaching speeds up to 135 kmh A magnetic braking system stops them just before they hit the ground . Mr. McMartin. Beta Pod Science. Question:. Have you ever seen a video of astronauts on the moon? They bounce around like beach balls even though they wear big, bulky spacesuits. Why is leaping on the moon easier than leaping on earth?. Gravity. Gravity is a force that for us is always directed downwards. But to say that gravity acts 
downwards is not correct. Gravity acts down, no matter where you stand on the Earth. It is 
better to say that on Earth gravity pulls objects towards the center of the Earth. So no matter 
where you are on Earth all objects fall to the ground. B. . Energy . change is understood in terms of forces--pushes or pulls. . C. Some forces act through physical . contact . while others act at a distance.. Big Idea 13 : Forces and Changes in Motion. Benchmark Number . . 4 – Newton’s Gravity Applied. ASTR 101. Prof. Dave Hanes. Orbiting Near, Around, . and Away from the Earth. Let’s consider:. Ballistic missiles on Earth. Artificial satellites. Geosynchronous satellites. orbit. by its . speed. – it is continually falling, but the Earth curves from underneath it.. Weightlessness?. What is it?. Your . weight is what you feel . ie. . your support force. Reading on a scale is zero…. . Black Holes and the. Curvature of Space-Time. . Black Holes. The name “black hole” was coined by John Archibald Wheeler, of Princeton University, in the 1960s. At that time, such objects were matters of idle speculation, not real astrophysical research.. Write down all given information. Write the formula you need to solve the problem.. Substitute the numbers in the equation.. Show all operations and solve.. Answers should include both numbers and units.. Gravity. Gravity is a force that for us is always directed downwards. But to say that gravity acts 
downwards is not correct. Gravity acts down, no matter where you stand on the Earth. It is 
better to say that on Earth gravity pulls objects towards the center of the Earth. So no matter 
where you are on Earth all objects fall to the ground. Forces. Distinguish between contact and noncontact forces.. Explore the Law of Gravity by recognizing that every object exerts a gravitational force.. Objectives. Essential Question. What forces may hinder the motion of a soccer ball rolling across a field?. A. nswer 9/7/16. A hiker’s velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that the hiker has a negative acceleration?. 4 Types of Friction. The 4 types of friction are: . Astronomy, Chapter 2. D Taylor. © 2011, 2012, 2013,2014. Gravity and Motion. 2. Introduction. Gravity. gives the Universe its structure. It is a universal force that causes all objects to pull on all other objects everywhere. What celestial object is attracted to the Earth?. The Moon. What celestial object is the Earth attracted to?. The Sun. Effect of the moon on the Earth. The Moon’s gravity also pulls on the Earth, but because the Earth is solid, it doesn’t seem to respond.. Forces & Gravity. Notes. Write down the words in yellow.. The words in white are discussion points, you may write these down, but are not required.. Gravity. Gravity is a . force. that pulls objects toward each other.. 1.1. Terminal settling velocity . A gravity settler is simply a long chamber through which the contaminated gas passes slowly, allowing time for particles to settle by gravity to the bottom. The important parameter is the terminal or settling velocity of the particle, .