PHY 121 Ch 5c Lecture

# PHY 121 Ch 5c Lecture - Lecture 9 Tuesday February 12 1 If...

This preview shows pages 1–7. Sign up to view the full content.

1 Lecture 9 Tuesday, February 12

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2 If a curve is banked it is easier for a car to turn it because A. The weight acquires a component in the direction of the centripetal acceleration. B. The normal force cancels the effect of gravity . C. The normal force becomes less than the weight. D. None of the above.
3 The centrifugal force A. cancels the effect of the centripetal force. B. causes circular motion when it is less than the centripetal force. C. does not exist. D. is not discussed in the reading assignment.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
4 An object is in uniform circular motion at speed v . If the speed is doubled, the net force needed to keep it going along the same circular path. .. A. Remains the same. B. Must be halved. C. Must be doubled. D. Must be quadrupled.
5 The protons in the nucleus of an atom are held together by A. their gravitational interaction. B. their electromagnetic interactions. C. the weak interaction that is also responsible for supernova explosions. D. the strong interaction.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
6 Uniform circular motion • If an object moves at constant speed, we know that the acceleration must be perpendicular to the velocity. • But not any constant speed motion is
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 10/05/2008 for the course PHY 121 taught by Professor Chamberlin during the Spring '08 term at ASU.

### Page1 / 18

PHY 121 Ch 5c Lecture - Lecture 9 Tuesday February 12 1 If...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online