# Search results

1. ### Double Angle Trig

1. Homework Statement Sin2x-cosx=1 Solve for all x values between [0,2pi) 2. Homework Equations Sin2x=2sinxcosx 3. The Attempt at a Solution 2sinxcosx-cosx=1 cosx(2sinx-1)=1 I don't know what to do after this. It doesn't equal 0 so I can't set each factor equal to 0
2. ### Conservation of Mechanical Energy on a Roller Coaster

1. Homework Statement A roller coaster at an amusement park is at rest on top of a 30 m hill (point A). The car starts to roll down the hill and reaches point B which is 10 m above the ground, and then rolls up the track to point C, which is 20 m above the ground. (A) A student assumes no...
3. ### Using Energy Equations to find Final Velocity

1. Homework Statement A box slides down an inclined plane (angle = 37*). The mass of the block is 35 kg, the coefficient of kinetic friction between the box and the ramp is 0.3, and the length of the ramp is 8 m. If it starts from rest at the top of the ramp, with what speed does it reach the...
4. ### Combining Spring Constants

1. Homework Statement For the following arrangement of two springs, determine the effective spring constant, keff. This is the force constant of a single spring that would produce the same force on the block as the pair of springs shown for this case. (Spring 1 is attached to Spring 2 which...