An object falls freely from rest near the surface of the Earth. What is the speed of the object when it has fallen 4.9 meters from its rest position?

a) 4.9m/s

b) 96 m/s

c) 9.8 m/s

d) 24m/s

I know that it is letter "c" but I don't know why.

1 - Don't put the coat on the snowman - it will melt him 2 - I don't think the coat will make any difference 3 - I think it will keep him cold and stop him from melting.

When compared to strong nuclear force, gravitational force is

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Earthquakes produce transverse waves. If a secondary wave of an earthquake is measured from crest to crest to be 23000 m and it travels at 4500 m/s, calculate the wave's frequency.

Application: Economics. A vector ~p = h150, 225, 375i represents the price in dollars of certain models of bicycles sold by a bicycle shop at costs given by the vector ~c = h125, 200, 360i.

4. A racing car has a uniform acceleration of 4 m s - '2. What distance will it cover in 10 s after start?

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the average wavelength in a series of ocean waves is 15.0 m. A wave crest arrives at the shore on average ever 20 seconds, so the frequncy is 0.050 Hz. What is the average speed of the wave?

A firework is ignited, and explodes with a flash and a loud bang as it is blown apart. The system consists of: the firework, the Earth, and the air. Which choice best describes how energy is transformed in the system?

Eclipse of the sun occurs (A). When the moon is between the sun and the earth. (B). When the earth is between the moon and the sun. (C). When the sun and the earth are parallel to each other. (D). When the moon is directly above the earth. (E).