B. sagot ko ate/kuya okay na ba yan
The ice where they stand on is considered to be frictionless, thus, no external force present. Their momentum is conserved in the system. There will be no change in momentum before and after the push off.
1. Boy 72 kg ? unknown
2. Girl 48 kg 6.8 m/s
Note: total initial momentum is zero and total final momentum is equal to total initial momentum.
Formula of momentum p=mv
Total initial momentum = Total final momentum
0 = p(boy) + p(girl)
0 = 72 kg × V(boy) + 48 kg × 6.8 m/s
0 - 326.4 kg. m/s = 72 kg × V(boy)
-326.4 kg.m/s / 72 kg = V(boy)
- 4.533 m/s = V(boy)
The boy moves westward at - 4.533 m/s opposite to the direction of the girl .
Hope it helps
Step by step solution:
Step 1: Calculate the time it takes the package before it hits the ground or time of falling
since there is no initial velocity of the package given
g=9.81 m/s^2 (gravitational constant)
get the value of t
t= 1.24 s (fall time)
Step 2: Calculate the horizontal distance it travels:
Use formula: (there is no gravity or acceleration that acts horizontally)
where (horizontal velocity)