Snap-pick the rotation numbers

Exercise and reference answers

Questions

1. Question

   A wheel goes from rest to 250 rpm in 5.00 s. Angular acceleration?

   Choices

   1. 5.24 rad/s sq
   2. 50.0 rad/s sq
   3. 26.2 rad/s sq

   Correct choice

   5.24 rad/s sq

2. Question

   A reel starts at rest and holds 110 rad/s sq for 2.00 s. Final omega?

   Choices

   1. 55.0 rad/s
   2. 220 rad/s
   3. 110 rad/s

   Correct choice

   220 rad/s

3. Question

   Bike goes 0 to 30.0 m/s in 4.20 s on 0.320 m wheels. Angular acceleration?

   Choices

   1. 7.14 rad/s sq
   2. 9.60 rad/s sq
   3. 22.3 rad/s sq

   Correct choice

   22.3 rad/s sq

4. Question

   Skater at 0.800 rev/s drops I from 2.34 to 0.363 kg m sq. New rate?

   Choices

   1. 5.16 rev/s
   2. 0.124 rev/s
   3. 2.94 rev/s

   Correct choice

   5.16 rev/s

5. Question

   A 250 N push at the 1.50 m rim of a merry-go-round. Torque?

   Choices

   1. 167 N m
   2. 375 N m
   3. 56.3 N m

   Correct choice

   375 N m

6. Question

   A 200 N push on a 0.320 m grindstone through 1.00 rad. Work done?

   Choices

   1. 625 J
   2. 200 J
   3. 64.0 J

   Correct choice

   64.0 J

Instructions

Tap the right value before the clock runs out.

Explanation