Homework Help: physics

Posted by Jon on Tuesday, April 1, 2008 at 10:10pm.

11)Which has more momentum, an elephant standing still or a raisin dropped from your hand?

The raisin

12)A player kicks a football with an initial velocity of 3.00 m/s at an angle of 60.0 above the horizontal. What is the horizontal distance traveled by the football?

A)0.312 m
B)0.397 m
C)0.673 m
D)0.795 m

3.00sine60
=2.6
0.0 m+(2.6 m/s)(2.6-0.0/9.80)+1/2(-9.80)(2.6-0.0/9.80)^2
=0.0+.69+1/2(-9.80)(2.6-0.0/9.80)^2
=.69+-4.9(.070387339)

I can't get one of those choices

physics - Quidditch, Tuesday, April 1, 2008 at 11:10pm
11) Correct

12) Separate the velocitie into vertical and horizontal components. Take the vertical velocity component and calculate how long the ball is in the air. Then, using that time and the horizontal component of the velocity, calculate the horizontal distance traveled.
I did get one of the shown answers.

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