If the 3-lb solid sphere is released from rest when θ=30∘, determine its angular velocity when θ=0∘, which is the lowest point of the curved path having a radius of 11.5 in. the sphere does not slip as it rolls.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.

Which scientist was the first to propose the heliocentric model of the universe? a. aristotle b. isaac newton c. galileo galilei d. nicolaus copernicus