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.

A container, partially filled with water, is resting on a scale that measures its weight. Suppose you place a 200 g piece of wood inside the container filled with water. What happens to the scale reading?

Who was the first man to the moon ... ?

Through what process does water leave the hydrosphere and enter the atmosphere

Which item is not a solid-state component?

Does sound travel faster in a warm room or a cold room? Explain your answer.

A fishbowl has a circular opening with a diameter of 13 cm. The fishbowl sits upright on a table in a magnetic field of 0.00110 T that is directed downward. What is the flux through the glass of the bowl? -1.5*10^-5 Wb -4.5*10^-4 Wb 0.0 Wb -5.

Why do cars need a cooling system in conjunction with the engine

A runner starts from rest and has an acceleration of 3 m/s2. How fast is she running after 1.1 seconds

Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?

A light ray travels inside a horizontal plate of glass, striking its upper surface at an angle of incidence of 50°. This ray is totally internally reflected at the glass-air boundary. A liquid is then poured on top of the glass.