The correct answer to the question is : A) The velocity of the cart after it hits the wall.
EXPLANATION:
Before answering this question, first we have to understand impulse.
Impulse of a body is defined as the change in momentum or the product of force with time.
Mathematically impulse = m ( v- u ).
Here, v is the final momentum and u is the initial momentum.
Hence, we need the velocity of the cart after it hits the wall in order to calculate the impulse of the lab cart.
R=ut+gt^2/2
r- displacement (height to find)
u - initial speed (zero)
t - time taken
r=0*5.8 + 10*5.8^2 /2 = 168.2 meters
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