What Are the Advantages of SI unit
1 answer:
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Answer:
-0.73 m/s
Explanation:
We can solve this problem by using the law of conservation of momentum.
In fact, in absence of external forces (the ice is frictionless, so no friction), the total momentum of Aisha + two boots is conserved.
At the beginning, their total momentum is zero, since they are at rest:
(1)
After, their total momentum is:
(2)
where:
M is Aisha's mass
v is Aisha's velocity relative to the ground
m = 4.50 kg is the mass of each boot
v' is the boot's velocity relative to the ground
We can find:
is Aisha's mass (where W = 637 N was her weight)
v' can be rewritten as:
because 6 m/s is the velocity of the boots relative to her, while v' is their velocity relative to the ground.
Substituting and combining (1) and (2) we find:
and the negative sign indicates that the direction is opposite to that of the boots.
Answer:
When the tangent of the cyclic frequency and time will be equal √2
Explanation:
Answer:
The magnitude of the electric field is 5.75 N/C towards positive x- axis.
Explanation:
Given that,
Point charge at origin = 2 nC
Second charge = 5 nC
Distance at x axis = 8 m
We need to calculate the electric field at the point x = 2 m
Using formula of electric field
Put the value into the formula
The direction is toward positive x- axis.
Hence, The magnitude of the electric field is 5.75 N/C towards positive x- axis.