ZuoTi.Pro
Question

I swing a ball around my head at constant speed in a circle with circumference 3...

I swing a ball around my head at constant speed in a circle with circumference 3 m. What is the work done on the ball by the 10 N tension force in the string during one revolution of the ball?

A.30 J

B.20 J

C.10 J

D.0 J

Why? I need help understanding this question. Should I use Krot=1/2Iw^2 equation???

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

W = Fs.

see work done is force dot product with distance

W=F.s = F*s*cos(theta)

the angle between tension force and distance is 90 degree

which implies

W=10*3*cos(90) = 0 joules

0 0
Add a comment
Know the answer?
Add Answer to:
I swing a ball around my head at constant speed in a circle with circumference 3...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 1) A cyclist rides around a circle track with a constant speed of 8 m/s. If...

    1) A cyclist rides around a circle track with a constant speed of 8 m/s. If the radius of the track is 150 m then what acceleration does it experience? 2) A 75 kg tightrope walker is in the middle of the rope. The tightrope sags in the middle and creates a 30 degree angle below the horizontal. What is the tension in the cable? 3) A 0.75 kg yo-yo is spun around at a constant speed in a circle....

  • A girl jogs around a horizontally circle with a constant speed. She travels one fourth of...

    A girl jogs around a horizontally circle with a constant speed. She travels one fourth of a revolution, a distance of 20.1 m along the circumference of the circle, in 4.7 s. The magnitude of her acceleration is ____ m/s2. Round your answer to the nearest tenth. Do not use scientific notation.

  • I filled a bucket with water and am swinging it around in a vertical circle so...

    I filled a bucket with water and am swinging it around in a vertical circle so that at the highest point, the bucket is directly over my head. The total distance from me to the water is 2 m. a. Draw a free body force diagram for the water in the bucket at the bottom of the swing. b. Draw a free body force diagram for the water in the bucket at the top of the swing. c. What is...

  • Please draw this out first and solve it: I use a rope 2.00 m long to...

    Please draw this out first and solve it: I use a rope 2.00 m long to swing a 10.0-kg weight around my head. The tension in the rope is 20.0 N. In half a revolution how much work is done by the rope on the weight?   a.40.0 J b. 126 J c. 251 J d. 0

  • 1. As part of a child’s game, a girl swings a ball on the end of...

    1. As part of a child’s game, a girl swings a ball on the end of a string in a horizontal circle with constant speed, as shown below. The string is 0.25m long and makes an angle of 35o with the vertical during the game. (a) What is the speed of the ball? (b) During half a revolution, what is the work done by tension and by gravity on the ball? 2. A boy kicks a 3kg box up the...

  • A 4150 kg wrecking ball swings in a horizontal circle motion around a crane, making a...

    A 4150 kg wrecking ball swings in a horizontal circle motion around a crane, making a 30 ◦ angle from the vertical. If the cable hoisting the ball is 12 m and during the swing the tension in the cable is 55 kN, with what speed is the ball moving? Report the value in m/s rounded to the nearest tenth.

  • A 0.25 kg ball is attached to a string. The ball goes around in a circle...

    A 0.25 kg ball is attached to a string. The ball goes around in a circle that is horizontal (parallel) to the ground. The circular path has a radius of 1.5 m. The rotation is at a constant rate of 50 rpm. a) list the given b) what is the tangential velocity of the ball? c) what is the centripetal acceleration (magnitude and direction)? d) what is the magnitude of the tangential acceleration? e) what is the soure of the...

  • A child is twirling a 0.0120-kg plastic ball on a string in a horizontal circle whose...

    A child is twirling a 0.0120-kg plastic ball on a string in a horizontal circle whose radius is 0.100 m. The ball travels once around the circle in 0.500 s. (a) Determine the centripetal force acting on the ball. (b) If the speed is doubled, does the centripetal force double? If not, by what factor does the centripetal force increase? Question I need answered is, Why is gravity not considered when solving this problem?

  • please ansa all A car travels around a curve with constant speed. The correct statement from...

    please ansa all A car travels around a curve with constant speed. The correct statement from the following is the car has an acceleration directed inward toward the center of the curve. the velocity of the car is constant. the car has an acceleration direction outward from the center of the curve. the car has zero acceleration. the car has an acceleration directed in the instantaneous direction of the velocity vector. A ball is whirled on the end of a...

  • please show work step by step Date . A 200 g ball at the end of...

    please show work step by step Date . A 200 g ball at the end of a 1.25 m string is twirled in a horizontal circle at constant speed. The ball makes a complete revolution every 0.600 s. (a) Ans: (b) What is the acceleration of the ball? Ans: (c) what is the tension in the string? Ans: What is the speed of the ball? A force of (5.0N, tx) acts on a 6.00 kg object moving along a horizontal...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT