Hey There!
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Question 1)
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DATA:
Force = F = 5N
time = t = 5 seconds
mass = m = 5 kg
momentum = p = ?
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SOLUTION:
IMPULSE FORCE:
The force which acts for a very short period of time is called impulse force. It is given by,
I = F x t
Where,
I is impulse
F is force
t is time till which force is exerted
The impulse experienced by the object equals the change in momentum of the object. In equation form,
F x t = M x ΔV
So,
F x t = Final momentum - initial momentum
F x t = final momentum - (0)
initial momentum is zero because the object was initially at rest.
Final momentum = 5 x 5
Final momentum = 25 [tex]kgms^{-1}[/tex]
So B is the answer
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Question 2)
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DATA:
Force = F = 30 N
time = t = 0.05 seconds
mass = m = 0.075 kg
V = ?
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SOLUTION:
impulse force is given by,
I = F x t
Where,
I is impulse
F is force
t is time till which force is exerted
The impulse experienced by the object equals the change in momentum of the object. So,
F x t = M x ΔV
So,
F x t = Final momentum - initial momentum
F x t = final momentum - (0)
Since it was at rest initially, initial momentum is zero.
Momentum is given by,
p = m x V
where,
p is momentum
m is mass
v is velocity
So,
F x t = m x V
Rearrange the equation,
V = [tex]\frac{Fxt}{m}[/tex]
[tex]V = \frac{(30)x(0.05)}{0.075} \\\\V = 20 m/s[/tex]
So C is the answer
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Best Regards,
'Borz'
