# Force,Styrofoam cube,pressure

Problem 13-82: A Styrofoam cube, 25.0 cm on an edge, is placed on one pan of a balance. The balance is in equilibrium when a 24.0-g mass of brass is placed on the other pan. Find the mass of the Styrofoam cube. Neglect the buoyant force of the brass mass, but do not neglect the […]

# Force,density,pressure.

Problem 13-32: A 1050-kg car rests on four tires, each of which is inflated to a gauge pressure of 246 kPa. If the four tires support the car’s weight equally, what is the area of contact of each tire with the road? Solution: Pressure = force / area Total force acting on all the four […]

# work,force,distance,potential difference,energy,electric field MCQ

Choose the best answer 1. Which of the following is a correct statement? Potential difference between two points is defined to be equal to the change in electrical potential energy of an electron displaced between the two points. The potential at a point due to a point charge is inversely proportional to the square of […]

# Components of vector,force.

On tracing the vectors we find that they are perpendiculars. a) A + B = | A + B|2 = |A| 2 + |B| 2 + 2|A| |B| cos 90 = |A| 2 + |B|2 A + B = (|A|2 + |B|2)1/2 b) A – B = |A – B|2 = |A|2 + |B|2 – […]

# Force,energy,mass, gravity

To stop any moving object we have to apply force, Force = mass x acceleration Here since the velocity of both the truck is same, The force we apply to stop the truck will only depend on the mass of the object. So lighter is the vehicle lesser is the force required to stop it. […]