A door 94 cm by 186 cm of mass 18 kg hangs on two H I N G E S. One is attached to the bottom of one side of the door and the other to the top of the same side. What is the magnitude of the horizontal force on the door by the bottom H I N G E? What's the magnitude of the horizontal force on the door by the top H I N G E?

heat the gas and measure the pressure

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

80cm/s.

24cm/s.

53.3cm/s.

0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2