Which of the following statements is not correct? a) In an inelastic collision,

Question

Which of the following statements is not correct?

a) In an inelastic collision, the total kinetic energy decreases.

b) Momentum is the product of mass and speed.    

c) Another way of stating Newton's Second Law is that the net force is equal to the rate at which momentum is changing.

d) In a collision between an insect and a truck, the insect exerts the same force on the truck as the truck exerts on the insect.

e) Total momentum is conserved if the net external force acting on a system is zero.

Explanation / Answer

B) is wrong as the momentum is the product of mass and velocity not speed. Velocity has direction and momentum has direction but speed has no direction.

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