Answer:
D
Explanation:
Because I said so
Velocity=2.5m/s
KE=4809.375J
Velocity=5m/2s=2.5m/s
KE=½×1539kg×(2.5m/s)²
The formula for force exerted on/by a spring is F = k*e where k is the spring constant and x is the distance stretched from unstrained position. This should allow you to find what you need.
Using F = k x e,
where k is the spring constant,
and e is the extension,
The F is her weight = 45 X 0.80
= 36 N
I don't know
because I don't know
