Question

A yo-yo is made of two solid cylindrical disks, each of mass 4.7×10−2 kg and diameter...

A yo-yo is made of two solid cylindrical disks, each of mass 4.7×10−2 kg and diameter 7.0×10−2 m, joined by a (concentric) thin solid cylindrical hub of mass 5.0×10−3 kg and diameter 1.2×10−2 m.

Part A: Use conservation of energy to calculate the linear speed of the yo-yo just before it reaches the end of its 1.1-m-long string if it is released from rest. (Express your answer using two significant figures.) The answer is V = 1.1 m/s

Part B: What fraction of its kinetic energy is rotational? (Express your answer using two significant figures.) I got 0.94 & 0.91 for my answers but both were incorrect.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

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
A yo-yo is made of two solid cylindrical disks, each of mass 4.7×10−2 kg and diameter...
A yo-yo is made of two solid cylindrical disks, each of mass 4.7×10−2 kg and diameter 7.0×10−2 m, joined by a (concentric) thin solid cylindrical hub of mass 5.0×10−3 kg and diameter 1.2×10−2 m. Part A: Use conservation of energy to calculate the linear speed of the yo-yo just before it reaches the end of its 1.1-m-long string if it is released from rest. (Express your answer using two significant figures.) The answer is V = 1.1 m/s Part B:...
1. A yo-yo consists of two solid disks, each of mass M and radius 3R. The...
1. A yo-yo consists of two solid disks, each of mass M and radius 3R. The two disks are connected by a rod of radius R and negligible mass. a.) The moment of inertia of the yo-yo about its axis of symmetry is of the form ???^2 where ? is a number. What is ?? b.) Draw the extended free body diagram for the yo-yo and use it to write Newton's 2nd law in terms of the magnitude of the...
9. A large toy yo–yo consisting of two uniform disks, each with radius r = 0.1...
9. A large toy yo–yo consisting of two uniform disks, each with radius r = 0.1 m and mass 0.5 kg, connected by a cylindrical piece with radius 1.0 cm and mass 0.1 kg is rolling down an incline plane (making an angle of 20◦ with respect to the horizontal). The yo–yo starts out from rest. What is the angular speed of the yo–yo after it travels through a height of 2.0 m?
Two 10-cm-diameter charged disks face each other, 20 cm apart. The left disk is charged to...
Two 10-cm-diameter charged disks face each other, 20 cm apart. The left disk is charged to - 50 nC and the right disk is charged to + 50 nC . Part A What is the electric field E⃗ , both magnitude and direction, at the midpoint between the two disks? Express your answer using two significant figures. Part B To the left disk. To the right disk. Parallel to the plane of the disks. SubmitRequest Answer Part C What is...
A 2.5 kg solid cylinder (radius = 0.10 m , length = 0.70 m ) is...
A 2.5 kg solid cylinder (radius = 0.10 m , length = 0.70 m ) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.90 m high and 5.0 m long. Part A When the cylinder reaches the bottom of the ramp, what is its total kinetic energy? (Express your answer using two significant figures.) (answer in J) Part B When the cylinder reaches the bottom of the ramp, what...
Part A A '29er' mounbtain bike wheel has a diameter of 29.0 in . What is...
Part A A '29er' mounbtain bike wheel has a diameter of 29.0 in . What is the moment of inertia of this wheel (expressed in standard units)? The rim and tire have a combined mass of 0.850 kg . Remember that 1in = 2.54cm.     Express your answer to two significant figures and include the appropriate units. I = SubmitRequest Answer Part B The mass of the hub (at the center) can be ignored (why?). The mass of the hub...
A uniform, solid sphere of mass 2.6 kg and diameter 33 cm is rotating about its...
A uniform, solid sphere of mass 2.6 kg and diameter 33 cm is rotating about its diameter at 150 rev/min. A) What is the kinetic energy of rotation? B) If an additional 1.74 J of energy are supplied to the rotational motion, what is the resulting rate of rotation? Give your answer in rev/min.
Problem 4 A hoop and a solid disk both with Mass (M=0.5 kg) and radius (R=...
Problem 4 A hoop and a solid disk both with Mass (M=0.5 kg) and radius (R= 0.5 m) are placed at the top of an incline at height (h= 10.0 m). The objects are released from rest and rolls down without slipping. a) The solid disk reaches to the bottom of the inclined plane before the hoop. explain why? b) Calculate the rotational inertia (moment of inertia) for the hoop. c) Calculate the rotational inertia (moment of inertia) for the...
Two 2.6 cm -diameter disks face each other, 3.0 mm apart. They are charged to ±20nC....
Two 2.6 cm -diameter disks face each other, 3.0 mm apart. They are charged to ±20nC. A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk? Express your answer to two significant figures and include the appropriate units.
A solid, cylindrical grinding wheel has mass 2.37 kg and diameter 11.0 cm. It has an...
A solid, cylindrical grinding wheel has mass 2.37 kg and diameter 11.0 cm. It has an angular speed of 1224 rev/min. when the motor that turns it is shut off. The wheel slows uniformly to a stop after 48 seconds due to frictional forces. Find: a. angular accleleration b. number of revolutions during the 48 seconds c. frictional torque that caused the wheel to slow to a stop d. wheels initial kinetic energy e. frictional power
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT