{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ch6+1410+FA11

# ch6+1410+FA11 - Chapter 6 Momentum and Collisions Practice...

This preview shows pages 1–9. Sign up to view the full content.

Momentum and Collisions Chapter 6

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

View Full Document
Practice Questions from SV-Ch06 Impulse and Momentum Questions Problems: 1, 4, 5, 7, 9, 13, 15 Conservation of Momentum Questions Problems: 19, 20, 22
The linear momentum of an object of mass m moving with a velocity is defined as the product of the mass and the velocity SI Units are kg m / s Vector quantity, the direction of the momentum is the same as the velocity’s Momentum

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

View Full Document
Applies to two-dimensional motion Momentum components
SV-Ch06-P05 A pitcher claims he can throw a 0.145Fkg baseball with as much momentum as a 3.00Fg bullet moving with a speed of 1.50 × 10 3 m/s. (a) What must the baseball’s speed be if the pitcher’s claim is valid? (b) Which has greater kinetic energy, the ball or the bullet?

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

View Full Document
SV-Ch06-P05 - Solution (a) If , then ball bullet p p ± ² ± ² 3 3 3.00 10 kg 1.50 10 m s 31.0 m s 0.145 kg bullet bullet ball ball m v v m ³ u u (b) The kinetic energy of the bullet is ± ² ± ² 2 -3 3 2 3 3.00 10 kg 1.50 10 m s 1 3.38 10 J 2 2 bullet bullet bullet KE m v u u u while that of the baseball is ± ² ± ² 2 2 0.145 kg 31.0 m s 1 69.7 J 2 2 ball ball ball KE m v The bullet has the larger kinetic energy by a factor of 48.4.
In order to change the momentum of an object, a net force must be applied Why? Newton’s 2nd and Momentum ~ F net = m ~ a ~ F net = m Δ ~ v Δ t ~ F net = m ( ~ v f - ~ v i ) Δ t ~ F net = ( m ~ v f - m ~ v i ) Δ t ~ F net = ( ~ p f - ~ p i ) Δ t

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

View Full Document
in more compact form: Or in other words, momentum changes when a force acts during a time interval This particular equation applies to constant or average forces.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 33

ch6+1410+FA11 - Chapter 6 Momentum and Collisions Practice...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online