A paramecium swimming through a fluid is moving at approximately a constant velocity as a result of wiggling its cilia. 1. What can you say about the magnitude of the net force that is being exerted on the paramecium while it is doing this?

a. It is significantly greater than zero.

b. It is a little bit greater than zero.

c. It is equal to zero.

d. It cannot be determined from the information given.

2. What can you say about the magnitude of the normal force that the paramecium's cilia exert on the water (N_cw) compared to the magnitude of the normal force that the water exerts back on the cilia (N_wc)?

a. N_cw is significantly greater than N_wc.

b. N_cw is a little but greater than N_wc.

c. N_cw is equal to N_wc.

d. N_cw is significantly less than N_wc.

e. N_cw is a little bit less than N_wc.

3. What can you say about the magnitude of the normal force that the paramecium's cilia exert on the water (N_cw) compared to the magnitude of the viscous force that the water exerts on the cilia (F^v_wc)?

a. N_cw is significantly greater than F^v_wc.

b. N_cw is a little but greater than F^v_wc.

c. N_cw is equal to F^v_wc.

d. N_cw is significantly less than F^v_wc.

e. N_c->w is a little bit less than F^v_w->c.

4. Explain why you chose the answers you did.