Question

A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is...

A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 510 rad/s2 for 12s, then coasts at a steady angular velocity for another 12s.

What is the speed of the dot at t = 1.0 s? Express your answer to two significant figures and include the appropriate units.

Through how many revolutions has it turned? Express your answer using two significant figures.

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 computer hard disk 8.0 cm in diameter is initially at rest. A small dot is...
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 700 rad/s2 for 12s, then coasts at a steady angular velocity for another 12s. What is the speed of the dot at t = 1.0 s? Through how many revolutions has it turned?
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is...
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 630 rad/s 2   for 1 2  s , then coasts at a steady angular velocity for another 1 2  s . Part A What is the speed of the dot at t = 1.0 s ? Express your answer to two significant figures and include the appropriate units. Part B Through how many revolutions has...
A computer hard disk starts from rest, then speeds up with an angular acceleration of 210...
A computer hard disk starts from rest, then speeds up with an angular acceleration of 210 rad/ s^2 for 5.0 s until it reaches its final angular speed. It rotates for another 6.0 s at that constant angular speed. It then slows down and comes to rest in 9.0 s. A. determine the angular speed of the disk 5.0 s after start up. Express your answer in rad/s and rpm (rev/min). B. determine the angular speed of the disk 11.0...
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 66-cm-diameter wheel accelerates uniformly about its center from 120 rpm to 280 rpmrpm rpm in...
A 66-cm-diameter wheel accelerates uniformly about its center from 120 rpm to 280 rpmrpm rpm in 4.6 s . A.Determine its angular acceleration. Express your answer using two significant figures. B. Determine the radial component of the linear acceleration of a point on the edge of the wheel 2.0 s after it has started accelerating. Express your answer using two significant figures. c. Determine the tangential component of the linear acceleration of a point on the edge of the wheel...
A flying disk (150 g, 25.0 cm in diameter) spins at a rate of 290 rpm...
A flying disk (150 g, 25.0 cm in diameter) spins at a rate of 290 rpm with its center balanced on a fingertip. What is the rotational kinetic energy of the Frisbee if the disc has 70% of its mass on the outer edge (basically a thin ring 25.0-cm in diameter) and the remaining 30% is a nearly flat disk 25.0-cm in diameter? 1)What is the rotational kinetic energy of the Frisbee? (Express your answer to two significant figures.)
A 73-cm-diameter wheel accelerates uniformly about its center from 150 rpm to 400 rpm in 3.7...
A 73-cm-diameter wheel accelerates uniformly about its center from 150 rpm to 400 rpm in 3.7 s. Part A Determine its angular acceleration. Express your answer using two significant figures. Part B Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.2 s after it has started accelerating. Express your answer to two significant figures and include the appropriate units. Part C Determine the tangential component of the linear acceleration of a...
A grinding wheel 0.27 m in diameter rotates at 2700 rpm . A) Calculate its angular...
A grinding wheel 0.27 m in diameter rotates at 2700 rpm . A) Calculate its angular velocity in rad/s. w = B) What is the linear speed of a point on the edge of the grinding wheel? Express your answer to two significant figures and include the appropriate units. v= C) What is the acceleration of a point on the edge of the grinding wheel? Express your answer to two significant figures and include the appropriate units. aR =
A merry-go-round accelerates from rest to 0.75 rad/srad/s in 36 ss. Assuming the merry-go-round is a...
A merry-go-round accelerates from rest to 0.75 rad/srad/s in 36 ss. Assuming the merry-go-round is a uniform disk of radius 8.0 mm and mass 3.10×104 kgkg , calculate the net torque required to accelerate it. Express your answer to two significant figures and include the appropriate units.
A 5.1-m-diameter merry-go-round is initially turning with a 4.5 s period. It slows down and stops...
A 5.1-m-diameter merry-go-round is initially turning with a 4.5 s period. It slows down and stops in 21 s . A: Before slowing, what is the speed of a child on the rim? Express your answer to two significant figures and include the appropriate units. v = ? B: How many revolutions does the merry-go-round make as it stops? Express your answer using two significant figures. delta degree = ?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT