Recent content by HazelDryad

Homework Statement 1. Given cos α = -24/25 in Quadrant II and sin β = -5/13 in Quadrant III, find sin (α + β). 2. Given sin α = 4/5 in Quadrant I and cos β = -12/13 in Quadrant II, find cos (α + β). Homework Equations I don't even know where to start! The textbook doesn't list any...

I am a little confused about how momentum works. If the mass were to increase, would the velocity also increase? If the mass were to increase, would the momentum also increase? If the mass was to decrease, would the velocity also decrease? If the velocity was to increase, would the...

Homework Statement The brakes of a 1452 kg car bring it to a stop from a speed of 17.2 m/s in a distance of 100 m. If the car originally stops in 6.2 s (100 m), what power is developed by the brakes? Homework Equations W = FF Δs W = ½ m· v^2 P = W/t P = F * v The Attempt at a...

I think I have it (the value of support force)! sin 35 x 2030. .5736 x 2030 = 1164.4N. 135 x 9.81 = 1324.35N. = 2488.75 N Is this correct now?

Homework Statement The worker pushes downward and to the left on the box at an angle of 35°. The box has a mass of 135 kg. The box moves horizontally across the floor to the left at a constant velocity. The force applied by the man is 2030 N∠215°. What is the value of the friction force...

Here is the problem I was given: The worker pushes downward and to the left on the box at an angle of 35°. The box has a mass of 135 kg. The box moves horizontally across the floor to the left at a constant velocity. If the force applied by the man is 2030 N∠215°, what is the value of the...