un granjero engancha un remolque cargado de leña a su tractor y lo arrastra 20m sobre el suelo horizontal. El peso total del remolque y la carga es de 14,700 N. El tractor ejerce una fuerza constante de 5000 N a la 36.9 grados sobre la horizontal. Una fuerza de fricción de 3500 N se opone al movimiento del remolque. Calcule el trabajo total realizado sobre el remolque

that would be B

Explanation:

:

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards