The role of valves in the heart is to:

Systolic pressure is your blood pressure at its highest and when the heart contracts.

A mass m is traveling at an initial speed v0 = 25.0 m/s. It is slows down to v = 19 m/s in a distance of 52.8 m by a force of 15.0 N. The mass is

A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 6 N. The coefficient of kinetic friction between the surfaces is 0.6. The force of friction is

The diagrams above show the application of a force to a level arm. Which diagram has the largest (magnitude) torque about the hinge?Capture(1).PNG 

Two objects, m1 and m2, both of mass m, are place on a horizontal platform which is rotating at a constant angular velocity. m1 = m is located at a distance R from the axis of rotation and the second object of mass m2 = 2m is located at a distance 2R. The linear velocity of mass m1 ____ to the linear velocity of m2

A car going around a curve of radius R at a speed V experiences a centripetal acceleration ac. What is its acceleration if it goes around a curve of radius 3R at a speed of 2V?

A bicycle wheel, a hollow sphere, and a solid sphere each have the same mass and radius. They each rotate about an axis through their centers. Which has the greatest moment of inertia and which has the least?

A disk of radius 0.05 m and moment of inertia 0.2 kg · m2. If the two forces with force showed in the figure are exserted on the disk, the resulting angular acceleration of the disk is 20 rad/s2. Determine the magnitude of the force . Capture.PNG  

Which of the following types of needles is frequently used in ophthalmologic procedures?