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PHY101 Lab 5 Questions and Correct
Answers/ Latest Update / Already Graded
When you whirl a rock tied to a string in a horizontal circle around your
head,
Ans: the string exerts a centripetal force on the rock.
The rotational inertia of a sphere of mass m and radius r is proportional
to __.
Ans: m r^2
When a spinning skater extends his arms from his side to point straight
out, his angular rotation decreases, meaning he spins slower. Why?
Ans: his moment of inertia increases
A ball is attached to a string and rotates in a circle. If it takes 1.00 s to
complete one revolution, what is the angular velocity of the ball?
Ans: 6.28 rad/s
All rights reserved © 2025/ 2026 |
PHY101 Lab 5 Questions and Correct
Answers/ Latest Update / Already Graded
When you whirl a rock tied to a string in a horizontal circle around your
head,
Ans: the string exerts a centripetal force on the rock.
The rotational inertia of a sphere of mass m and radius r is proportional
to __.
Ans: m r^2
When a spinning skater extends his arms from his side to point straight
out, his angular rotation decreases, meaning he spins slower. Why?
Ans: his moment of inertia increases
A ball is attached to a string and rotates in a circle. If it takes 1.00 s to
complete one revolution, what is the angular velocity of the ball?
Ans: 6.28 rad/s
All rights reserved © 2025/ 2026 |
