Object A of mass M is released from height H, whereas object B of mass 0.5M is released from height 2H. What is the ratio of the
velocity of object A to that of object B immediately before they hit the ground?
A. 1:2
B. 1.41 :1
C. 1: 1.41
D. 1:4
E. 1:1
A. 1:2
B. 1.41 :1
C. 1: 1.41
D. 1:4
E. 1:1
1 answer:
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Answer:
20,850 N
Explanation:
We can solve the problem by using second Newton's Law:
where
F is the force
m is the mass
a is the acceleration
In this problem, we have:
m = 70 kg is the mass
is the acceleration (which is negative, because it is a deceleration)
So, we can use the equation above to find the force:
and the negative sign simply means that the force is in the opposite direction to the motion.