Question

Notify Me Bookmark

The swimmer shown in the figure exerts an average horizontal backward force of 75.0 N with his arm during each 1.80 m long stroke. (a) What is his work output (in J) in each stroke? J (b) Calculate the power output (in W) of his arms if he does 100 strokes per minute. W

The swimmer shown in the figure exerts an average horizontal backward force of 75.0 N with his arm during each 1.80 m long stroke. (a) What is his work output (in J) in each stroke? J (b) Calculate the power output (in W) of his arms if he does 100 strokes per minute. W

Image text
The swimmer shown in the figure exerts an average horizontal backward force of 75.0 N with his arm during each 1.80 m long stroke. (a) What is his work output (in J) in each stroke? ◻ J (b) Calculate the power output (in W) of his arms if he does 100 strokes per minute. ◻ W

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

Consider the following figure. m = 50.0 kg (a) What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. N (b) The triceps muscle at the back of her upper arm has an effective lever arm of 1.76 cm, and she exerts force on the floor at a horizontal distance of 18.4 cm from the elbow joint. Calculate the magnitude of the force in newtons in each triceps muscle. N Compare the magnitude of the total force exerted by both triceps muscles to her weight. total force exerted by both triceps muscles her weight = (c) How much work does she do in joules if her center of mass rises 0.260 m? (d) What is her useful power output in watts if she does 23 push-ups in one minute? 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

(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