As a projectile moves in its path, is there any point along the path where the velocity and acceleration vectors are:(a) perpendicular to each other (b) Parallel to each other

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

J. j. thomson’s experiment disproved the theory that an atom

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.