Answer:
D. "The net force is zero, so the acceleration is zero"
Explanation:
edge 2020
Answer:
33= 0+10 * t so t = 33 / 10 = 3.3 hrs
They both have an objective lens and an eyepiece lens.
Answer:
FA / FB = 100
Explanation:
given two identical cars
let their initial speed be U m/s
for car 1 let it deaccelerates with a1
0 = U² - 2*a1*(10cm)
a1 = U² / (2*(0.1))
car2 deaccelerates with a2
0 = U² - 2*a2*(10)
a2 = U² / (2*(10))
FA = m*a1
FB = m*a2
FA/FB = a1 / a2
= 10/0.1
= 100
FA/FB = 100
<span>11.25 kg of sand.
The coefficient of static friction tells you what fraction of the normal force is needed to start the object moving. Since the block is on a horizontal surface, the normal force is the same as the mass of the block. Therefore
M = 28 * 0.450 = 12.60
So once the mass hanging off the cord reaches 12.60 kg, the block will start to move. And since the bucket masses 1.35 kg, you need to subtract the mass of the bucket from the total mass needed, giving
M = 12.60 - 1.35 = 11.25</span>