A circular specimen of MgO is loaded using a three-point bending mode. Compute the minimum possible radius of the specimen witho
1 answer:
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Answer:
2 g/cm³
Explanation:
m = Mass of object
v = Volume
ρ = Density
When ρ = 2 g/cm³ , v = 5 cm³
All the objects have same mass, which is 10 grams
When v = 5 cm³
Density of third object is 2 g/cm³
Answer:
2.12m/s
Explanation:
Given parameters:
Force on trolley = 1.5N
Mass of trolley = 0.2kg
Unknown:
Velocity of the trolley = ?
Solution:
To solve this problem, we first find the acceleration of the trolley;
Force = mass x acceleration
Acceleration =
Insert the parameters and solve;
Acceleration = = 7.5m/s²
Now to find the acceleration;
Initial velocity = 0m/s
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the acceleration
S is the distance
Distance = 30cm and this is 0.3m
v² = 0² + 2(7.5)0.3 = 4.5
v = √4.5 = 2.12m/s