Question

Using second law of motion, derive the relation between force and
acceleration. A bullet of 10 g strikes a sand-bag at a speed of 103 ms-1
and gets embedded after travelling 5 cm. Calculate

(i) the resistive force exerted by the sand on the bullet.

(ii) the time taken by the bullet to come to rest.​​

Answer 1

Explanation:

according to second law of motion the change of momentum of a body is directly proportional to the net force acting on it and take place in the direction of the net force

formula equal to F

$f = ma$

$=$

Answer 2

Answer:

Particle size in a suspension is more than the particle size in a colloidal solution. Also molecular interactions in a suspension are not strong enough to keep the particles suspended and thus theysettle down, when left undisturbed. On the other hand, owing to their smaller size, colloidal particles remain suspended, even when left undisturbed.