Does it matter if I include the y direction in the equation? Would I need to make two equations one going toward the wall and another going away? But then if I equal to them wouldn't it be zero?
Homework Statement
a 8kg steel ball strikes a wall with a speed of 11.7 m/s at an angle of 35.3 degrees with the normal to the wall. it bounces off with the same speed and angle as shown in the picture.
http://img405.imageshack.us/img405/7733/asdfkf7.jpg
If the ball is in contact with...
Homework Statement
Tony of mass 55kg coasts on his bi cycle of mass 5 kg at a constant speed of 5m/s carrying a 6kg pack. tony throws his pack forward, in the direction of his motion, at 1 m/s relative to the speed of bicycle just before the throw.
Initial momentum of system (tony...
Homework Statement
a 58kg pole vaulter falls from rest from a height of 5.3m onto a foam rubber pad. the pole vaulter comes to rest 0.38 seconds after landing on the pad
Calculate the constant force exerted on the pole vaulter due to the collision. Answer in N
Homework Equations
d...
Homework Statement
During an autumn storm, a 0.012 kg hail stone traveling at 20 m/s made a .20 cm deep dent in the hood of a person's car. What average force did the car exert to stop the damaging hail stone?
Homework Equations
d = vt
ft = mv
The Attempt at a Solution
Vav =...
Homework Statement
If 270 million people in the US jumped in the air at simultaneously, pushing off Earth with an average force of 800 N each for a time of 0.10 seconds, what would happen to the the 5.98e24 kg Earth? Show calculation that justifies your answer.
Homework Equations
F =...