Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is

a. 3.0" 102 N

b. 0.22 N

c. 0.16 N

d. 0.30 N

e. 0.98 N

d. 0.3 N

Explanation:

Force: This is defined as the product of mass of a body and its acceleration.

The S. I unit of Force is Newton (N).

Mathematically Force can be represented as,

F = ma ... Equation 1

Where F = force, m = mass, a = acceleration.

also

a = (v-u) / t ... Equation 2

Where v = final velocity, u = initial velocity, t = time.

Given: v = 0.60 m/s, u = 0 m/s (From rest), t = 0.16 s.

Substitute into equation 2

a = (0.60-0) / 0.16

a = 3.75 m/s²

Also given: m = 80 g = 0.08 kg.

Substitute into equation 1,

F = 0.08 (3.75)

F = 0.3 N.

Hence he average force = 0.3 N

The right option is d. 0.3 N