Which one of the following SI base units is not matched to the correct unit of measurement?
2 answers:
Answer:
C. Length: km
Explanation:
Let's analyze each option:
A. Mass: in the SI system, mass is measured in kilograms (kg), so this matching is correct.
B. Time: in the SI system, time is measured in seconds (s), so this matching is correct.
C. Length: in the SI system, length is measured in meters (m). The kilometer, instead, is a multiple of the meter (). Therefore, this matching is not correct.
D. Temperature: in the SI system, temperature is measured in Kelving (K), so this matching is correct.
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Answer:
Explanation:
The football players collide in a completely inelastic collision, in other words they have the same velocity after the collision, this velocity has a magnitude V=1.6m/s.
We need to use the conservation of momentum Law, the total momentum is the same before and after the collision, at the initial point the receiver does not have any speed
(1)
We solve in order to find the receiver mass: