The system shown above is released from rest. If the friction is negligible, the acceleration of the 4 kg block sliding on the table shown above is: (Take g =10 m/s)
A. O m/s?
B. 1.7 m/s2
C. 3.3 m/s2
D. 5 m/s2
E. 10 m/s2

What is the frequency of a light wave with a wavelength of 620nm

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j