Question

During a neighborhood baseball game in a vacant lot, a particularly wild hit sends a 0.146 kg baseball casing throw pane of a second floor window in a nearby building. The ball strikes the glass at 15.3 m/s, shatters the glass site through, and leaves the window at 10.7 m/s with no change of direction. 

What is the direction of the impulse that the glass imparts to the baseball? 

opposite the direction of the ball's motion 

neither of these 

in the direction of the ball's motion 

Calculate the magnitude of this impulse (a positive number). impulse: 

The ball is in contact with the glass for 0.0101 s as it passes through. Find the magnitude of the average force of the glass on the ball (a positive number). average force:

Answer 1

A)

Opposite to the direction of ball's motion

B)

Impulse, J = m dv = 0.146 (15.3 - 10.7) = 0.67 kg m/s

C)

J = F t

0.67 = F x 0.0101

Force, F = 66.50 N

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