A condition of the law of conservation of momentum is that no external forces are at play. Look at each of the following situations and choose if the law applies to it. Select all that apply.
Two cars collide on a dirt road where the force of friction is high
A bullet strikes a wooden block, causing the block to accelerate from rest.
O A coin sliding on a table experiences a frictional force.
Two kinetic carts collide on a frictionless surface.

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?