Question

1. Water sits in a tall, glass with vertical sides. Does the water exert a net force on the vertical side?

a	Yes, the net force of the water on the side of the glass is parallel to surface (side of the glass).

b	Yes, the net force of the water on the side of the glass is perpendicular to the surface (side of the glass).

c	Yes, the net force of the water has components both parallel and perpendicular to the side of the glass.

2. Which of the following states Pascal’s principle?

a.	If an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount.

b.	The buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object.

c.	Pressure at lower vertical levels in a fluid increases due to the weight of the fluid above

3. What causes a suction cup to stick?

a	The suction cup forms strong chemical bonds with the surface it touches.

b	The air between the suction cup and the surface actively pulls the suction cup towards the surface.

c	The atmospheric pressure on the outside of the suction cup pushes the suction cup and the surface together. This force is stronger than the force of the air between the suction cup and the surface which pushes them apart.

Answer 1