A0.450-kg hammer is moving horizontally at 7.00 m/s when it strikes a nail and comes to rest after driving the nail 1.00 cm into a board. assume constant acceleration of the hammer-nail pair. calculate the duration of the impact. what was the average force exerted on the nail?

a)0.00286 s

b)1103 N

Explanation:

Given

mass of hammer

Initial speed

hammer drives nail into a board

Using

where u=initial velocity

v=final velocity

a=acceleration

s=distance moved

Time taken by it to stop completely

(b)Average

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).