A block of mass 7.8kg is sliding over a frictionless surface, toward the right, at an...
A block of mass 7.8kg is sliding over a frictionless surface, toward the right, at an initial speed of 14m/sec. Let the x-axis point toward the right. Compute its initial momentum, P0, and record its momentum in the space provided:
a) P0 = ________ i + ________ j
b) The block collides with a wall, and afterwards is moving at
14m/sec toward the LEFT. (This is a “perfectly elastic collision”,
BTW). Record its momentum after the collision, P1, in the space
provided.
P1 = ________ i + ________ j
c) Compute the change in momentum, ΔP = P1 – P0 in the space
provided. This change in momentum is the impulse imparted by the
wall to the block.
ΔP = ________ i + ________ j
d) The block is in contact with the wall for a total time interval
of Δt = 0.015sec. Use the definition of average force: F = ΔP/Δt,
to determine the average force F exerted by the wall on the block
during the collision.
F = ________ i + ________ j
Homework Answers
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A block of mass 7.8kg is sliding over a frictionless surface,
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