Exam 10: Force and Force-Related Variables in Engineering

A "teeter-totter" (or "see-saw" if you prefer) has a 22.68 kg child sitting at one end, 3.05 m from the center pivot point (fulcrum).How far from the center point should a 56.70 kg adult sit in order to balance the teeter-totter?

Calculate the torque produced by a 50 N perpendicular force at the end of a 20 cm-long wrench.

The acceleration of an object is directly proportional to the force that is causing the acceleration.This is a basic description of

Stress provides a measure of the intensity of internal forces acting over an area.

A ductile material shows little or no permanent deformation before it ruptures.

A force that will accelerate 1 kilogram of mass at a rate of is known as one

If you push sideways gently on your textbook and it doesn't move, it is most likely because

Linear impulse represents the net effect of a force acting over a period of time and brings about a change in the linear momentum of the object.

Forces tend to do what to objects upon which they act?

A brittle material, when subjected to a tensile load, will go through significant permanent deformation before it breaks.

A tow truck exerts a force of on a car, causing it to accelerate at .What is the mass of the car?

If you push on your textbook so that it slides across the table at a constant velocity,

The modulus of rigidity is a measure of how easily a material can be twisted or sheared.

If you drop your textbook, while it is falling it speeds up, therefore

The value of fluid bulk modulus shows how easily the volume of the fluid can be reduced when the pressure acting on it is increased.

The absolute pressure is related to the gauge pressure according to

Pressure is a fundamental dimension.

A single force can exist all by itself.

A force of 20 N causes a spring to stretch 5 cm.What is the spring constant?

The modulus of elasticity, or Young's modulus, is computed by calculating the slope of a stress-strain diagram over the elastic region.