Answer:
(a) The velocity is 12 m/s.
(b) The average force is 18 000N.
Explanation:
(a) The principle of conservation of momentum,
total momentum before = total momentum after
- = +
But, the initial velocities equal zero,
= = 0
So that,
0 = +
Substituting the values of variables given in the question,
0 = 1 × + 0.02 × 600
0 = + 12
= - 12 m/s
Thus, the velocity is 12 m/s.
(b) F = ma
From the third equation of motion,
= + 2as
a = -
=
= -900, 000 m/s^2
a = 900, 000 m/s^2
The acceleration is 900 Km/s^2.
F = 0.02 × 900000
= 18 000 N
Thus, the average force is 18 000N.