A 100 kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.2. What should be the magnitude of the force, so that the net work done by it and the kinetic frictional force is zero?

A 5.40-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is µk 0.410. A horizontal force pulls the box at constant velocity for 23.0 cm. Find the work done by the applied horizontal force. Submit Answer Tries 0/10 Find the work done the frictional force. Submit Answer Tries 0/10 Find the work done by the net force. Submit Answer Tries 0/10

A 70 kg rollerblader skates across a skating rink floor. The graph below shows the net external force component F cos(?) along the displacement as a function of the magnitude of the displacement d. Determine the following.   (a) the work done (in J) by the net force component F cos(?) acting on the rollerblader as he moves from 0 to 5.0 m   (b) the work done (in J) by the net force component F cos(?) acting on the rollerblader from 5.0 m to 10.0 m

Chapter 07, Problem 024 Go In the figure, a horizontal force F, of magnitude 20.0 N is applied to a 3.17 kg book as the book slides a distanced = 0.93 m up a frictionless ramp at angle e = 30°. (a) During the displacement, what is the net work done on the book by Fa, the gravitational force on the book, and the normal force on the book? (b) If the book has zero kinetic energy at the start of the displacement, what is its speed at the end of the displacement? (a) Number Units (b) Number Units Click if you would like to Show Work for this question: Open Show Work Question Attempts: Unlimited SAVE FOR LATER SUBMIT ANSWER co search 6:56 PM ENG 3/30/2021 ASUS 13) t6 f9 home F10end pouse break fmpgup prt sc delete insert % 3 7. 8. 9. bocksp 10

The figure shows three forces applied to a trunk that moves leftward by 3.01 mover a frictionless floor. The force magnitudes are F1- 4.50 N, F2 - 9.48 N, and F3- 2.85 N, and the indicated angle is e- 60°. (a) During the displacement, what is the net work done on the trunk by the three applied forces, the gravitational force, and the normal force? (b) Is there a net transfer of energy to or from the trunk? (c) Does the kinetic energy of the trunk increase or decrease? (a) Number i Units (b) (c)

A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 61.2-kg water-skier has an initial speed of 5.1 m/s. Later, the speed increases to 12.1 m/s. Determine the work done by the net external force acting on the skier.

A hockey puck of mass 0.26 kg is sliding along a slippery frozen lake, with an initial speed of 64 m/s. The coefficient of friction between the ice and the puck is eventually causes the puck to slide to a stop. Find the work done by friction. J = 0.031. Friction

Starting from rest, a 4.70-kg block slides 3.40 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is = 0.436. (a) Determine the work done by the force of gravity. (b) Determine the work done by the friction force between block and incline. (c) Determine the work done by the normal force. (d) Qualitatively, how would the answers change if a shorter ramp at a steeper angle were used to span the same vertical height?

A 66.1-kg skier coasts up a snow-covered hill that makes an angle of 29.8 ° with the horizontal. The initial speed of the skier is 8.59 m/s. After coasting a distance of 2.13 m up the slope, the speed of the skier is 4.95 m/s. (a) Find the work done by the kinetic frictional force that acts on the skis. (b) What is the magnitude of the kinetic frictional force?

A box with with a mass m = 2kg is being pushed up a ramp by an unknown pushing force Fp. The coefficient of static friction between the box and interface is 0.7. The coefficient of kinetic friction between the box and interface is 0.6. The incline of the ramp is 15 degrees. The velocity of the box is constant. The surface of the ramp is 12 m.  What is the work done by normal force while the box is being pushed the entire length of the ramp? [ I think that it is 0 N, since the x component of normal force which is parallel to motion is 0. Is that correct?]