A21 kg block slides down a frictionless slope which is at angle θ = 25◦ . starting from rest, the time to slide down is t = 1.51 s. the acceleration of gravity is 9.8 m/s 2 . 21 kg s 25◦ what total distance s did the block slide? answer in units of

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

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is