Question

Notify Me Bookmark

Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 80.0 kg, down a θ = 56.0∘ 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 (in J) by friction as the sled moves 30.0 m along the hill? J (b) How much work is done (in J) by the rope on the sled in this distance? J (c) What is the work done (in J) by gravity on the sled? J (d) What is the total work done (in J)? J

Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 80.0 kg, down a θ = 56.0∘ 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 (in J) by friction as the sled moves 30.0 m along the hill? J (b) How much work is done (in J) by the rope on the sled in this distance? J (c) What is the work done (in J) by gravity on the sled? J (d) What is the total work done (in J)? J

Image text
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 80.0 k g , down a θ = 56.0 ∘ 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 (in J) by friction as the sled moves 30.0 m along the hill? ◻ J (b) How much work is done (in J) by the rope on the sled in this distance? ◻ J (c) What is the work done (in J) by gravity on the sled? ◻ J (d) What is the total work done (in J)? ◻ J

Detailed Answer

0 0

Please enter your email here. You will get email when this question is answered by our tutor.

Doubtrix Logo

Problem is not yet solved!

Click on Notify me to get email when question is answered.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Notify me Login Sign Up

Similar/Related Questions

A crate of mass 9.2 kg is pulled up a rough incline with an initial speed of 1.46 m/s. The pulling force is 98 N parallel to the incline, which makes an angle of 20.5∘ with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 4.98 m. (a) How much work is done by the gravitational force on the crate? J (b) Determine the increase in internal energy of the crate-incline system owing to friction. J (c) How much work is done by the 98−N force on the crate? J (d) What is the change in kinetic energy of the crate? J (e) What is the speed of the crate after being pulled 4.98 m? m/s
Solution
0 0

(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) m = 53 kg N (b) How much work (in J) does she do if her center of mass rises 0.220 m? J (c) What is her useful power output (in W) if she does 15 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.) W
Solution
0 0

A uniform disk of mass 351 kg and radius 0.26 m is mounted on frictionless bearings so it can rotate freely around a vertical axis through its center (see the following figure). A cord is wrapped around the rim of the disk and pulled with a force of 10 N. (a) How much work (in J) has the force done at the instant the disk has completed four revolutions, starting from rest? J (b) Determine the torque due to the force. (Enter the magnitude in N⋅m.) N⋅m Calculate the work (in J) done by this torque at the instant the disk has completed four revolutions. J (c) What is the angular velocity (in rad/s) at that instant? (Enter the magnitude.) rad/s (d) What is the power output (in W) of the force at that instant? W
Solution
0 0