- #1
Troi Jones
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Homework Statement
A 0.5 kg block of ice is sliding by you on a very slippery floor at 2.5 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.0035 seconds. The block eventually slides at an angle of 24 degrees from its original direction (labeled θ in the diagram). The overhead view shown in the diagram is approximately to scale. The arrow represents the average force your toe applies briefly to the block of ice. (Only components involved are x and z, as shown in the picture.)
Homework Equations
delta p= Fnet*delta t
p= m*v
Pythagorean theorem possibly?
Trigonometry
The Attempt at a Solution
Which components of the block's momentum are changed by the impulse applied by your foot? (Check all that apply. The diagram shows a top view, looking down on the xzplane.)[/B]
Its the z component that only changes. The kick was perpendicular to the momentum in the + x direction, so x is not effected.
What is the unit vector in the direction of the block's momentum after the kick?
Not really sure what this question is saying. I know that in the vector the x component will be positive and the z component will be negative, but I'm lost of how to find the momentum for z...What is the x-component of the block's momentum after the kick?
Stated earlier, x component wasn't affected, so the momentum is still 1.25 kg*m/s
Remember that
Can't do this problem without that unit vector in question 2
Use your answers to the preceding questions to find the z-component of the block's momentum after the kick (drawing a diagram is helpful):
pfz = ? kg · m/s
What was the magnitude of the average force you applied to the block?
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It be much obliged to have some guidance to solve the questions that are blank