Answer:
A. 0.806 kN
B. 0.303 kN
Explanation:
<h3>A.</h3>
The kinetic energy of the ball is ...
KE = 1/2mv² = 1/2(0.206 kg)(18 m/s)² = 33.372 J
The work required to reduce this to zero over a distance of 4.14 cm is ...
W = Fd
F = W/d = (33.372 J)/(0.0414 m) = 0.806 kN
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<h3>B.</h3>
When the distance is 11 cm, the force is ...
F = (33.372 J)/(0.11 m) = 0.303 kN
Yes it is possible to add sound to a system to make it quieter
The formula is KE=1/2MV^2
The kinetic energy of the bicycle is 40 J
Explanation:
#1. The first one would be both because In rowing, the action is the rower pulling the oar through the water, and the reaction is the boat moving the opposite way.
#2. is reaction because for every action force there is an equal and opposite reaction force
#3. is reaction
#4. is action
i really hope this helps you and tell me if i got any wrong.