A 5 kg block is attached to a horizontal spring. a) The springs constant is 400 N/m. If the spring is compressed 5 cm then released, what is its speed when it passes the equilibrium point? x=0 b) if the μ=0.2, how far will the block slide before it stops?

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n