Question

A football of mass 0.4 kg at rest acquires a speed of 20 m/see when kicked. What is the
impulse imparted to ball?
A) 4 N. sec
C) 2 N see
B) 5 N. sec
D) 8 N sec​

Answer 1

Answer:

option d 8 N

Explanation:

mass of football =0.4kg

initial velocity of ball =0............(balls at rest)

final velocity of ball =20m\s

therefore acceleration=finalvelocity- initialvelocity

-------------------------------------

time

A= 20-0

------ =20

1

acceleration= 20 m/s^2

Force = mass x acceleration

force = 0.4 x 20.

= 8Newton

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