Question

A person performs a bench press. The bar’s mass is 50 kg. When this person’s arms...

A person performs a bench press. The bar’s mass is 50 kg. When this person’s arms are extended, the bar is 0.6m above the starting point. What is the magnitude and direction of the work performed by the person to push the bar off his chest to full extension of his arms?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Work done is given by product of force and displacement.
In this example, the person has to apply a force against the weight force so that he can lift the weight in an upward direction,



0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
12. Through what angle in degrees does a 31 rpm record turn in 0.27 s 13....
12. Through what angle in degrees does a 31 rpm record turn in 0.27 s 13. Starting from rest, the same torque is applied to a solid sphere and a hollow sphere. Both spheres have the same size and mass, and both are rotating about their centers. After some time has elapsed, which sphere will be rotating faster? answer choices: a. hollow sphere b. They will be rotating equally fast c. solid sphere 14. In movies, it often happens that...
ch 6 1: It is generally a good idea to gain an understanding of the "size"...
ch 6 1: It is generally a good idea to gain an understanding of the "size" of units. Consider the objects and calculate the kinetic energy of each one. A ladybug weighing 37.3 mg flies by your head at 3.83 km/h . ×10 J A 7.15 kg bowling ball slides (not rolls) down an alley at 17.5 km/h . J A car weighing 1260 kg moves at a speed of 49.5 km/h. 5: The graph shows the ?-directed force ??...
What tools could AA leaders have used to increase their awareness of internal and external issues?...
What tools could AA leaders have used to increase their awareness of internal and external issues? ???ALASKA AIRLINES: NAVIGATING CHANGE In the autumn of 2007, Alaska Airlines executives adjourned at the end of a long and stressful day in the midst of a multi-day strategic planning session. Most headed outside to relax, unwind and enjoy a bonfire on the shore of Semiahmoo Spit, outside the meeting venue in Blaine, a seaport town in northwest Washington state. Meanwhile, several members of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT