Please help this due 11:59
2 answers:
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Answer:
C. Impulse = F*t=(m*a)*t= m*(a*t) = m*Dv= D(Momentum) (“D” here’s mean Delta so change in)
Explanation:
In fact, the impulse is equal to the change in momentum of an object.
Impulse is defined as the product between the force (F) and the time (t):
however, the force is defined as the product between mass (m) and acceleration (a):
But the product a (acceleration) times t (time) is equal to the change in velocity of the object:
And this is exactly the definition of change in momentum:
Answer:
Required time, t = 0.84 seconds
Explanation:
It is given that,
Initial speed of an object, u = 22 m/s
Final velocity of an object, v = 27 m/s
Acceleration, a = 5.93 m/s²
We have to find the time required for an object to go a speed of 22 m/s to a speed of 27 m/s. It can be solved by using first equation of motion as:
Where
t = time
t = 0.84 seconds
Hence, the time required for an object is 0.84 seconds.
The potential at a distance r from a charge Q is given by
where ke is the Coulomb's constant.
The charge in our problem is
; for the point at 
, the potential is
For the point at infinity, we immediately see that the potential is zero, because
and so 
.
Therefore, the potential difference between the two points is
where ke is the Coulomb's constant.
The charge in our problem is
For the point at infinity, we immediately see that the potential is zero, because
Therefore, the potential difference between the two points is