Periodic motiona block of mass m is attached to a horizontal spring with force constant k. it is moving with simple harmonic motion of amplitude a. a) calculate how much of the energy of the motion is kinetic at x=1/4 a. b) if one adds a mass smoothly in a vertical drop at x=a, calculate what happens to a, t and omega.

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Determine the maximum r-value of the polar equation r =3+3 cos 0