Answer
given,
mass of the goalie(m₁) = 70 kg
mass of the puck (m₂)= 0.11 kg
velocity of the puck = 31.5 m/s
elastic collision
A person, whose eye has a lens-to-retina distance of 2.0 cm, can only clearly see objects that are closer than 1.0 m away. what
1 answer:
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Answer:
Height:
Formular:
Substitute:
Answer:
The electric field always decreases.
Explanation:
The electric field due to a point charge is given by :
Where
k = electric constant
q = charge
r = distance from the charge
It is clear from the above equation that as the distance from the charge particle increases the electric field decreases. As you move away from a positive charge distribution, the electric field always decreases. Hence, the correct option is (c) "Always decreases".
We can decompose the problem on x- and y-axis.
The position vector decomposed is:
The velocity vector can be found computing the derivative of r on both axes:
So, the velocity vector is
r' = 1i+2atj
The speed (the magnitude of the velocity vector) is
Finally we can write the acceleraion vector by performing derivation on the velocity vector:
and so
r''=2a j
The position vector decomposed is:
The velocity vector can be found computing the derivative of r on both axes:
So, the velocity vector is
r' = 1i+2atj
The speed (the magnitude of the velocity vector) is
Finally we can write the acceleraion vector by performing derivation on the velocity vector:
and so
r''=2a j