You need to raise a heavy block by pulling it with a massless rope. You can eithera. pull the block straight up height hh, orb. pull it up a long, frictionless plane inclined at a 15 degree angle until its height has increased by h.Assume you will move the block at constant speed either way. Will you do more work in case a or case b or both.   I don't understand why work is the same because I thought work= Fcos theta So technically a should be doing more work but that is not the answer.

Wfric Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 100.0 kg down a 60° slope at constant speed, as shown in the figure. The coefficient of friction between the sled and the snow is 0.100. = (a) How much work is done by friction as the sled moves 30.0 m along the hill. Enter to 3 significant figures Wrope 1.47 × 10³ J = W grav 60° (b) How much work is done by the rope on the sled in this distance? Hint: use Newton's second law to find the tension. Enter to 3 significant figures W -2.39x104 T = 2.55×104 J (c) What is the work done by the gravitational force on the sled? Enter to 3 significant figures

Someone please help

ACTIVITY 4: DECODE THE MESSAGE Directions: Determine the work done by the force on a given system in the following problems. Then, decode the message. I hv a e 4 Displacement (m E You pull your bag with a force of 30 N parallel to the ground classroom 20 m away. How much work will you do on your bag? MA crate is being lifted into a truck. If it is moved with a 2470 N force and 3650 J of work is done, then how far is the crate being lifted? M You must exert a force of 4.5 N on a book to slide it across a table. If you do 2.7 J of work in the process, how far have you moved the book? towards your

A box is pulled 2.0 meters along a rough surface at constant velocity using 100 N force inclined at 30° above the horizontal.  a.If the force applied, Fa is doubled but the frictional force remains the same (this is unlikely to occur in practice since normal force changes), will the net work be the same? b. Is Fa is doubled with the frictional force unchanged how much kinetic energy would the block have after being pulled 2.0 m?

b

A child pulls a wagon 5.0 m using a force of 25 N at an angle 15 degrees above horizontal. The force of friction on the wagon is 8.1 N. Calculate the work done on the wagon in the horizontal direction.   a. 6.5 J b. 24.1 J c. 32.5 J d. 80 J e. 84.5 J f. 125.1 J g. 125 J h. don't be silly, you can't calculate the net work without the change in KE!!

On a horizontal surface with µk = 0.70, a 5kg object is dragged with 350N force directed due East. a. Draw all forces, and calculate the work done by each force if the object moves from 3 m to 10 m on the x-axis. Calculate the total work.