A ladder 9 m long rest at an angle of 60" to the horizontal against a smooth vertical
wall. Calculate the frictional force and the
normal force of the ground if the ladder
has a mass of 25 kg and its center of
gravity is one-third way up from the
bottom of the ladder. Use g = 9.8ms-2

the reason is because the moon has some form of gravity, and that gravity pulls the ocean tides.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2