# A constant force of 5N acts for 5 seconds on a mass of 5kg initially at...

Question 31
A

125kgms-1

B

25kgms-1

C

15kgms-1

D

0kgms-1

##### Explanation

Impulse = momentum

Impulse = Force (f) $$\times$$ time (t)

Momentum = mass (m) $$\times$$ velocity (v)

Ft = Final momentum - initial momentum

FT = mv - mu

Since it is initially at rest u = 0

5 x 5 = mv ? m(0)

25 = mv

Final momentum = 25kgms$$^{-1}$$

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