Find the average speed and the average velocity.
Average speed = distance / time
distance = 10 x 8000 m = 80,000 m
time = 20 min * 60 s/min = 1200 s
Average speed = 80,000 m / 1200 s = 66.67 m/s
Average velocity = displacement / time
Given that the race car made complete circles the final poin is the same initial point, then its displacement is zero and the average velocity is zero too.
A tigers lost one and yyyyyyyy was the first day in a while and they didn’t have a back up 4.5 50m
Answer:
1.2 kg
Explanation:
Let UP ramp be the positive direction
F = ma
T - Wt || - Ff = m(0)
mg - Μgsinθ - μΜgcosθ = 0
m(9.8) - 13sin35 - 0.36(13)cos35 = 0
m = 13(sin35 + 0.36cos35) / 9.8
m = 1.15205... ≈ 1.2 kg
Expands. Water is a rare compound that expands when frozen.
Using momentum balance, we can say that the momentum
before the strike and after the strike are equal. Therefore:
m1 v1 + m2 v2 = m’ v’
However the door is not moving before the strike therefore
v2 = 0:
0.010 kg * 450 m/s + 0 = (7.010 kg) v’
<span>v’ = 0.64 m/s </span>
