Recent content by kraaaaamos

so for b its: P = (500+ mgsin(theta))(v) = [500 + (710)(9.8)(sin2) ](v) = 17 085 W?

Homework Statement A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500N. What power is required from the car’s engine to drive the car a. on a level ground? b. up a hill with a slope of 2.0 0? Homework Equations P=Fv The Attempt at a...

Homework Statement a. How much work must you do to push a 10 kg block of steel across a steel table at a steady speed of 1.0 m/s for 3 s? The coefficient of kinetic friction for steel on steel is 0.60. b. What is your...

Someone Please Help - Ramp Launch And Friction ! 1. Homework Statement A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 35* angle. The block’s initial speed is 10m/s. (Given that μk = 0.20) a. What vertical height does the block reach above its starting point? b...

Projectile motion with friction on an inclined plane -- PLEASE HELP! Homework Statement A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 35* angle. The block’s initial speed is 10m/s. (Given that μk = 0.20) a. What vertical height does the block...

Homework Statement Sam, whose mass is 75 kg, takes off across level snow on his jet-powered skis. The skis have a thrust of 200N and a coefficient of kinetic friction on snow of 0.10. Unfortunately, the skis run out of fuel after only 10 s. a. What is Sam’s top speed...

b + r = 10, b = 10-r b - r = 6 10-r-r = 6 10-2r = 6 4 = 2r r = 2 ? : )

how do i do that? = S

Homework Statement A boat traveling with the current has a speed of 10km/h. The same boat travels against the same current at the speed of 6km/h. At what speed is the river flowing? Homework Equations The Attempt at a Solution 10km/h - 6km/h = 4km/h ?

Homework Statement 5. A car starts from xi = 10m at ti = 0s and moves with the velocity graph shown in figure on the right. a. What is the object’s position at t = 2s, 3s, and 4s? b. Does this car ever change direction? If so, at what time? Homework...

I have no idea what the answer is. Can you give me a hint for these questions: 1. a. Can a vector have a component equal to zero and still have nonzero magnitude? Explain. b. Can a vector have zero magnitude if one of its components is nonzero? Explain.

I looked at the question again. a) Yes. It can have a Y-component of zero and a non-zero x-component, which will equal to a nonzero magnitude. Therefore, a vector can have zero component, but still have a nonzero magnitude. b) I'm not sure. Is the magnitude zero if someone travels 6m...

Vectors and Magnitude - Theoretical -- PLEASE HELP! Homework Statement 1. a. Can a vector have a component equal to zero and still have nonzero magnitude? Explain. b. Can a vector have zero magnitude if one of its components is nonzero? Explain. Homework Equations During...

Okay, I think I've got it. It's kinda like figuring out the hypotenuse? Thanks everyone : )

I have no idea. I assume he mans displacement, instead of distance. :S Is the magnitude of distance the same as displacement?